/* ================================================
   AK² Lab - メインスタイルシート
   ================================================
   v40.html の CSS を Eleventy 版に移植
   ================================================ */

/* --- CSS Variables & Reset --- */
:root {
    --color-primary:       #025DCC;
    --color-secondary:     #00C6FF;
    --color-dark:          #0f172a;
    --color-text:          #334155;
    --color-text-light:    #475569;
    --color-text-lighter:  #cbd5e1;
    --color-bg-light:      #f8fafc;
    --color-white:         #ffffff;

    --font-sans:    "Noto Serif JP", serif;
    --font-english: "Lato", sans-serif;
    --font-mono:    "Roboto Mono", monospace;

    /* グラスモーフィズム */
    --glass-bg:     rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.65);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
    --glass-blur:   20px;

    --container-width: 1240px;
    --header-height:   80px;

    /* Z-Index */
    --z-header:    50;
    --z-nav:       40;
    --z-content:   10;
    --z-card:       5;
    --z-waves:      3;
    --z-particles:  1;
    --z-shapes:     0;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--font-sans);
    background-color: var(--color-white);
    color: var(--color-text);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; transition: color 0.3s ease; }
ul { list-style: none; padding: 0; margin: 0; }
img { max-width: 100%; height: auto; display: block; }
p { margin-bottom: 1.5em; }
p:last-child { margin-bottom: 0; }

/* --- Layout --- */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: var(--z-content);
}
.section { padding: 120px 0; position: relative; overflow: hidden; }

/* セクションヘッダー */
.section-header { text-align: center; margin-bottom: 80px; position: relative; z-index: var(--z-content); }
.section-header__subtitle {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-secondary);
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 0.8rem;
}
.section-header__title {
    font-size: 2.2rem;
    font-weight: 500;
    color: var(--color-dark);
    margin: 0;
    display: inline-block;
    position: relative;
}
.section-header__title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
    margin: 1.2rem auto 0;
    border-radius: 2px;
}
.section--dark {
    background-color: var(--color-dark);
    color: var(--color-white);
}
.section--dark .section-header__title { color: var(--color-white); }
.section--dark .section-header__subtitle { opacity: 0.8; }

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* --- Animations --- */
.fade-in-section {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.fade-in-section.is-visible {
    opacity: 1;
    transform: none;
}
@keyframes gentle-float {
    0%, 100% { transform: translateY(0px); }
    50%       { transform: translateY(-8px); }
}
.float-animation { animation: gentle-float 5s ease-in-out infinite; }

@keyframes gentle-fade-in-up {
    0%   { opacity: 0; transform: translateY(5px); }
    100% { opacity: 1; transform: translateY(0); }
}

/* --- Header --- */
.site-header {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    z-index: var(--z-header);
    transition: all 0.4s ease;
    height: var(--header-height);
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}
.site-header.is-scrolled {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 4px 20px rgba(0,0,0,0.04);
    height: 70px;
}
.site-header.is-transparent {
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: none;
    box-shadow: none;
}
.site-header__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

/* ブランドロゴ */
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}
.brand__logo-svg {
    height: 40px;
    width: 40px;
    transition: transform 0.3s ease;
}
.brand:hover .brand__logo-svg { transform: scale(1.05); }
.brand__text {
    display: flex;
    align-items: baseline;
    gap: 12px;
}
.brand__name {
    font-family: var(--font-english);
    font-weight: 700;
    color: var(--color-dark);
    font-size: 1.3rem;
    letter-spacing: 0.05em;
    line-height: 1;
}
.brand__sub {
    font-size: 0.8rem;
    color: var(--color-text-light);
    font-weight: 400;
    line-height: 1;
}

/* ナビゲーション */
.nav-menu { display: flex; gap: 1.5rem; }
.nav-menu__link {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
    position: relative;
    padding: 0.5rem 0;
    cursor: pointer;
    font-family: var(--font-mono);
}
.nav-menu__link::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 0; height: 2px;
    background: var(--color-secondary);
    transition: width 0.3s ease;
}
.nav-menu__link:hover { color: var(--color-primary); }
.nav-menu__link:hover::after { width: 100%; }

/* ── ハンバーガーボタン ─────────────────────────────────────────── */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    flex-shrink: 0;
}
.hamburger__bar {
    display: block;
    width: 24px;
    height: 3px;
    background: #0f172a;
    border-radius: 2px;
    transition: transform 0.35s cubic-bezier(0.23, 1, 0.32, 1),
                opacity 0.2s ease;
    transform-origin: center;
}
.hamburger.is-open .hamburger__bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.hamburger.is-open .hamburger__bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.hamburger.is-open .hamburger__bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ── モバイル表示 ───────────────────────────────────────────────── */
@media (max-width: 1000px) {
    .hamburger { display: flex; }

    /* nav アコーディオン：ヘッダー直下にスライドダウン */
    .site-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        max-height: 0;
        overflow: hidden;
        background: rgba(8, 20, 50, 0.97);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        z-index: var(--z-nav);
        pointer-events: none;
        transition: max-height 0.35s cubic-bezier(0.23, 1, 0.32, 1);
    }
    .site-nav.is-open {
        max-height: 350px;
        pointer-events: auto;
    }

    /* nav リンク */
    .site-nav .nav-menu {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 0.5rem 0;
    }
    .site-nav .nav-menu__link {
        display: block;
        padding: 0.9rem 1.5rem;
        font-size: 1rem;
        font-weight: 400;
        letter-spacing: 0.05em;
        color: rgba(255, 255, 255, 0.85);
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        transition: color 0.2s ease, background 0.2s ease;
    }
    .site-nav .nav-menu__link::after { display: none; }
    .site-nav .nav-menu__link:hover,
    .site-nav .nav-menu__link.is-active {
        color: var(--color-secondary);
        background: rgba(255, 255, 255, 0.04);
    }

    /* メニュー開放中はヘッダー背景を不透明に（ハンバーガーが見えるように） */
    .site-header.menu-open {
        background: rgba(255, 255, 255, 0.98) !important;
        backdrop-filter: blur(12px) !important;
        box-shadow: none !important;
    }

    /* その他モバイル調整 */
    .brand__text { flex-direction: column; align-items: flex-start; gap: 4px; }
    .brand__sub { display: none; }
}

/* --- Background Shapes (装飾ぼかし図形) --- */
.bg-shape-layer {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    overflow: hidden;
    z-index: var(--z-shapes);
    pointer-events: none;
}
.bg-shape-item {
    position: absolute;
    border-radius: 40px;
    filter: blur(80px);
    opacity: 0.8;
    animation: rotate-float 30s infinite linear;
}
@keyframes rotate-float {
    0%   { transform: translate(0, 0) rotate(0deg); }
    33%  { transform: translate(40px, -60px) rotate(120deg); }
    66%  { transform: translate(-30px, 30px) rotate(240deg); }
    100% { transform: translate(0, 0) rotate(360deg); }
}

/* --- Hero Section --- */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background-color: var(--color-bg-light);
}
.hero-particles {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: var(--z-particles);
    pointer-events: none;
}
.hero-content {
    position: relative;
    z-index: var(--z-content);
    text-align: center;
    max-width: 1000px;
    padding: 0 24px 80px;
    margin: 0 auto;
}

/* ロゴアニメーション */
.hero-logo-container {
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
    position: relative;
}
.brand-path {
    fill-opacity: 0;
    stroke-width: 50;
    stroke-linecap: round;
    stroke-linejoin: round;
}
.brand-path.filled {
    fill-opacity: 1;
    stroke-width: 10;
    transition: all 1.5s ease;
}
.shining-effect {
    stroke-width: 200;
    stroke-opacity: 1;
    fill: none;
    pointer-events: none;
    filter: drop-shadow(0 0 5px rgba(0, 198, 255, 0.8));
}
@keyframes loopShine {
    0%   { stroke-dashoffset: 0; }
    100% { stroke-dashoffset: -20000; }
}

.hero-brand-name {
    font-family: var(--font-english);
    font-size: 1.2rem;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    margin-bottom: 2rem;
    font-weight: 700;
}
.hero-headline {
    font-weight: 500;
    margin-bottom: 1.5rem;
    color: var(--color-dark);
    letter-spacing: 0.05em;
    font-size: clamp(2rem, 8vw, 44pt);
    line-height: 1.2;
    opacity: 0;
    animation: gentle-fade-in-up 1.2s ease-out forwards;
    animation-delay: 0.3s;
}
.hero-concept-en {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--color-secondary);
    letter-spacing: 0.05em;
    margin-bottom: 3rem;
    font-weight: 700;
}
.hero-description {
    font-size: 1.15rem;
    color: var(--color-text);
    margin-bottom: 4rem;
    line-height: 2.2;
    font-weight: 300;
}

/* SVG Wave (Heroの底辺) */
.waves-container {
    position: absolute;
    bottom: 0; left: 0;
    width: 100%;
    height: 15vh;
    min-height: 100px;
    max-height: 150px;
    z-index: var(--z-waves);
    pointer-events: none;
    margin-bottom: -1px;
    overflow: hidden;
}
.waves { width: 100%; min-width: 1800px; height: 100%; }
.parallax > use { animation: move-forever 25s cubic-bezier(.55,.5,.45,.5) infinite; }
.parallax > use:nth-child(1) { animation-delay: -2s; animation-duration: 54s; }
.parallax > use:nth-child(2) { animation-delay: -3s; animation-duration: 33s; }
.parallax > use:nth-child(3) { animation-delay: -4s; animation-duration: 15s; }
.parallax > use:nth-child(4) { animation-delay: -5s; animation-duration: 11s; }
@keyframes move-forever {
    0%   { transform: translate3d(-90px,0,0); }
    100% { transform: translate3d(86px,0,0); }
}

/* --- Cards --- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}
@media (min-width: 1024px) {
    .card-grid { grid-template-columns: repeat(4, 1fr); }
}
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-top: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: var(--glass-shadow);
    border-radius: 16px;
    padding: 2.5rem;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    height: 100%;
    position: relative;
    z-index: var(--z-card);
    display: flex;
    flex-direction: column;
}
.glass-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.8);
}
.card-title {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 0.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}
.card-text { font-size: 0.95rem; color: var(--color-text-light); line-height: 1.8; }

/* --- Philosophy Section --- */
.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
    position: relative;
    z-index: var(--z-content);
}
.philosophy-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    border: 1px solid rgba(0,0,0,0.02);
    transition: transform 0.3s ease;
}
.philosophy-card:hover { transform: translateY(-5px); }
.philosophy-char {
    font-family: var(--font-english);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    display: block;
    margin-bottom: 0.5rem;
    line-height: 1;
}
.philosophy-term {
    display: block;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 1rem;
    font-size: 1rem;
}
.philosophy-desc {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.6;
}
.philosophy-message {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    line-height: 2.2;
    font-size: 1.05rem;
    position: relative;
    z-index: var(--z-content);
}
.philosophy-sub {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--color-text-light);
    font-family: var(--font-mono);
}

/* --- Concept Section --- */
.section--concept-detail { background-color: #ffffff; }
.concept-layout {
    display: flex;
    flex-direction: column;
    gap: 4rem;
    margin-bottom: 4rem;
}
.concept-layout:last-child { margin-bottom: 0; }
@media(min-width: 900px) {
    .concept-layout { flex-direction: row; align-items: center; }
    .concept-layout.reverse { flex-direction: row-reverse; }
}
.concept-visual {
    flex: 1;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    min-height: 300px;
}
.concept-text-area { flex: 1; }
.concept-head {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--color-primary);
    padding-left: 1rem;
}
.concept-body { font-size: 1rem; line-height: 2; color: var(--color-text); }
.concept-note {
    font-size: 0.85rem;
    color: #64748b;
    margin-top: 1rem;
    font-family: var(--font-mono);
}

/* --- Stance Section --- */
.section--stance {
    background-color: #f8fafc;
    border-top: 1px dashed rgba(2, 93, 204, 0.2);
    border-bottom: 1px dashed rgba(2, 93, 204, 0.2);
}
.stance-infographic {
    width: 100%;
    height: 300px;
    background-color: #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    margin-bottom: 4rem;
    color: #64748b;
    font-weight: 700;
    font-size: 1.2rem;
}
.stance-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}
.stance-card-horizontal {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 6px rgba(0,0,0,0.02);
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    transition: all 0.3s ease;
}
.stance-card-horizontal:hover {
    transform: translateX(5px);
    border-color: var(--color-secondary);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}
.stance-icon {
    flex-shrink: 0;
    color: var(--color-primary);
    padding-top: 5px;
}
.stance-icon svg { width: 32px; height: 32px; }
.stance-content { flex-grow: 1; }
.stance-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
    color: var(--color-dark);
}
.stance-body { font-size: 0.95rem; line-height: 1.8; color: var(--color-text); }
@media(max-width: 600px) {
    .stance-card-horizontal { flex-direction: column; gap: 1rem; }
}

/* --- Target Section --- */
.section--target { background-color: var(--color-white); position: relative; }
.target-card-vertical {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-top: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: var(--glass-shadow);
    border-radius: 16px;
    padding: 2.5rem 1.5rem;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    height: 100%;
    position: relative;
    z-index: var(--z-card);
    display: flex;
    flex-direction: column;
    align-items: center;
}
.target-card-vertical:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.9);
}
.target-icon-wrapper {
    width: 70px; height: 70px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    color: var(--color-secondary);
}
.target-icon-wrapper svg { width: 32px; height: 32px; }
.target-title {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: 0.8rem;
    font-weight: 700;
}
.target-text { font-size: 0.9rem; color: var(--color-text-light); line-height: 1.6; }
.target-footer {
    text-align: center;
    margin-top: 4rem;
    font-weight: 700;
    color: var(--color-primary);
    font-size: 1.1rem;
    position: relative;
    z-index: var(--z-content);
}

/* --- Service Section --- */
.section--service {
    background-image: url('https://images.unsplash.com/photo-1497366216548-37526070297c?auto=format&fit=crop&w=2000&q=80');
    background-size: cover;
    background-position: center;
    background-attachment: scroll; /* iOS の fixed は挙動が不安定なため scroll に変更 */
}
.section--service::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(255, 255, 255, 0.9);
    z-index: 1;
}
.service-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2.5rem;
    position: relative;
    z-index: var(--z-content);
}
@media(min-width: 800px) {
    .service-grid { grid-template-columns: 1fr 1fr; }
}
.service-card {
    background: rgba(255, 255, 255, 0.6);
    border-radius: 16px;
    padding: 2.5rem;
    border-top: 5px solid var(--color-primary);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}
.service-card:hover { transform: translateY(-3px); }
.service-card__title { font-size: 1.4rem; margin-bottom: 0.5rem; color: var(--color-dark); font-weight: 700; }
.service-card__tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    color: white;
    background: var(--color-text-light);
    padding: 0.2em 0.8em;
    border-radius: 4px;
    margin-bottom: 1.5rem;
    align-self: flex-start;
    font-family: var(--font-mono);
}
.service-card__price {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
    line-height: 1;
}
.service-card__desc { flex-grow: 1; color: var(--color-text); }
.tech-note-card {
    background: #fff;
    border: 1px solid #cbd5e1;
    border-left: 5px solid #64748b;
    padding: 2rem;
    border-radius: 8px;
    margin-top: 4rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.03);
    position: relative;
    z-index: var(--z-content);
}
.tech-note__title { font-size: 1.1rem; font-weight: 700; color: var(--color-dark); margin-bottom: 0.8rem; }

/* --- Samples / Library / Apps Sections --- */
.section--samples {
    background-color: #f8fafc;
    background-image: linear-gradient(to right, rgba(226, 232, 240, 0.5) 1px, transparent 1px),
                      linear-gradient(to bottom, rgba(226, 232, 240, 0.5) 1px, transparent 1px);
    background-size: 40px 40px;
}
.section--library {
    background-color: #f0f9ff;
    background-image: repeating-linear-gradient(45deg, transparent, transparent 10px, rgba(255,255,255,0.7) 10px, rgba(255,255,255,0.7) 20px);
}
.section--apps {
    background-color: var(--color-dark);
    background-image: radial-gradient(#334155 1px, transparent 1px);
    background-size: 30px 30px;
    color: white;
}
.centered-content { text-align: center; max-width: 800px; margin: 0 auto; }
.content-placeholder {
    background: white;
    border: 2px dashed #cbd5e1;
    padding: 4rem 2rem;
    border-radius: 16px;
    color: var(--color-text-light);
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.content-placeholder__title { font-weight: 700; font-size: 1.25rem; margin-bottom: 1rem; }
.content-placeholder__note {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    font-family: var(--font-mono);
}
.apps-intro { max-width: 800px; margin: 0 auto 2rem; color: var(--color-text-lighter); }
.apps-note { margin-bottom: 2rem; color: #94a3b8; font-family: var(--font-mono); }

/* --- Comics Section --- */
.section--comics { background-color: #fff; }

/* --- Greeting Section --- */
.section--greeting { background-color: #f8fafc; }
.section--greeting::before {
    content: 'DIRECTOR';
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    font-size: 15vw;
    font-weight: 900;
    color: rgba(0,0,0,0.03);
    font-family: var(--font-english);
    z-index: 1;
    pointer-events: none;
    white-space: nowrap;
}
.greeting-layout {
    display: flex;
    flex-direction: column;
    gap: 4rem;
    position: relative;
    z-index: var(--z-content);
}
@media(min-width: 900px) {
    .greeting-layout { flex-direction: row; align-items: flex-start; }
}
.greeting-visual {
    flex: 0 0 350px;
    position: relative;
}
.greeting-visual img { border-radius: 20px; box-shadow: 0 20px 40px rgba(0,0,0,0.1); }
.greeting-content { flex: 1; }
.greeting-headline {
    font-size: 1.6rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 2.5rem;
    line-height: 1.4;
}

/* --- FAQ Section --- */
.section--faq { background-color: #ffffff; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 1.2rem;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0,0,0,0.03);
    border: 1px solid rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}
.faq-item:hover { box-shadow: 0 8px 20px rgba(0,0,0,0.05); }
.faq-summary {
    padding: 1.5rem 2rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--color-dark);
    list-style: none;
}
.faq-summary::-webkit-details-marker { display: none; }
.faq-icon {
    transition: transform 0.3s ease;
    color: #94a3b8;
    font-style: normal;
    font-size: 1.2rem;
}
details[open] .faq-icon { transform: rotate(180deg); color: var(--color-primary); }
.faq-answer {
    padding: 0 2rem 2rem;
    color: var(--color-text);
    font-size: 0.95rem;
    line-height: 1.8;
    border-top: 1px solid #f1f5f9;
    padding-top: 1.5rem;
}

/* --- Contact Section --- */
.section--contact {
    background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 100%);
}
.contact-intro {
    text-align: center;
    margin-bottom: 4rem;
    position: relative;
    z-index: var(--z-content);
}
.contact-intro__lead {
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}
.contact-form {
    max-width: 700px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.95);
    padding: 4rem;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.05);
    position: relative;
    z-index: var(--z-content);
}
@media(max-width: 600px) { .contact-form { padding: 2rem; } }
.form-group { margin-bottom: 1.8rem; }
.form-label { display: block; margin-bottom: 0.8rem; font-weight: 700; font-size: 0.95rem; color: var(--color-dark); }
.form-input, .form-textarea {
    width: 100%;
    padding: 1.2rem;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-family: inherit;
    transition: border-color 0.3s ease;
    font-size: 1rem;
}
.form-input:focus, .form-textarea:focus { outline: none; border-color: var(--color-primary); }
.form-textarea { height: 180px; resize: vertical; }
.form-actions { text-align: center; margin-top: 3rem; }

/* --- Buttons --- */
.btn-base {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50px;
    font-weight: 700;
    transition: all 0.3s ease;
    text-align: center;
    cursor: pointer;
    font-family: var(--font-sans);
}
.btn-primary {
    padding: 1rem 3rem;
    background: linear-gradient(135deg, var(--color-primary), #004eb3);
    color: white;
    box-shadow: 0 8px 20px rgba(2, 93, 204, 0.25);
    letter-spacing: 0.05em;
    border: none;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 25px rgba(2, 93, 204, 0.3); color: white; }
.btn-outline {
    padding: 0.8rem 2.5rem;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    background: transparent;
}
.btn-outline:hover { background: var(--color-primary); color: white; box-shadow: 0 5px 15px rgba(2, 93, 204, 0.2); }

/* --- Footer --- */
.site-footer {
    background: var(--color-dark);
    color: white;
    padding: 6rem 0 2rem;
    position: relative;
    overflow: hidden;
}
.site-footer::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}
@media(max-width: 800px) { .footer-grid { grid-template-columns: 1fr; gap: 3rem; } }
.footer-logo { display: inline-block; margin-bottom: 1.5rem; }
.footer-desc { color: var(--color-text-lighter); font-size: 0.9rem; line-height: 1.8; margin-bottom: 2rem; }
.footer-heading {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 1.5rem;
    letter-spacing: 0.05em;
}
.footer-links li { margin-bottom: 1rem; }
.footer-links a {
    color: var(--color-text-lighter);
    font-size: 0.95rem;
    transition: all 0.3s;
    display: inline-block;
}
.footer-links a:hover { color: white; transform: translateX(5px); }
.copyright {
    text-align: center;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: #64748b;
    font-size: 0.8rem;
    font-family: var(--font-english);
}

/* ============================================================
   ADDITIONAL STYLES — Multi-page & Component Library
   ============================================================ */

/* --- Active Nav --- */
.nav-menu__link.is-active {
    color: var(--color-primary);
}
.nav-menu__link.is-active::after {
    width: 100%;
}

/* --- Utility Buttons (追加) --- */
.btn-ghost {
    padding: 0.8rem 2.5rem;
    border: 2px solid transparent;
    color: var(--color-primary);
    background: transparent;
}
.btn-ghost:hover { background: rgba(2,93,204,0.05); color: var(--color-primary); }
.btn-light {
    padding: 0.8rem 2.5rem;
    background: white;
    color: var(--color-dark);
    border: 2px solid rgba(255,255,255,0.6);
    margin-top: 1.5rem;
    display: inline-block;
}
.btn-light:hover { background: #f1f5f9; color: var(--color-primary); }
.btn-secondary {
    padding: 0.8rem 2.5rem;
    background: #f1f5f9;
    color: var(--color-text);
    border: 2px solid #e2e8f0;
}
.btn-secondary:hover { background: #e2e8f0; color: var(--color-dark); }
.btn-gradient {
    padding: 1rem 3rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: white;
    box-shadow: 0 8px 20px rgba(2,93,204,0.25);
    border: none;
}
.btn-gradient:hover { transform: translateY(-2px); box-shadow: 0 10px 25px rgba(2,93,204,0.35); color: white; }
.btn-gradient-warm {
    padding: 1rem 3rem;
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    color: white;
    box-shadow: 0 8px 20px rgba(245,158,11,0.25);
    border: none;
}
.btn-gradient-warm:hover { transform: translateY(-2px); box-shadow: 0 10px 25px rgba(245,158,11,0.35); color: white; }
.btn-sm { padding: 0.6rem 1.8rem; font-size: 0.85rem; }
.btn-lg { padding: 1.2rem 3.5rem; font-size: 1.05rem; }
.btn-icon { display: inline-flex; align-items: center; gap: 0.5rem; }

/* --- Card Variants (追加) --- */
.section--white { background: #ffffff; }

.card-border {
    background: white;
    border: 1.5px solid #e2e8f0;
    border-radius: 16px;
    padding: 2.5rem;
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}
.card-border::before {
    content: '';
    position: absolute;
    left: 0; top: 0;
    width: 4px; height: 100%;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-secondary));
    transform: scaleY(0);
    transition: transform 0.3s ease;
    transform-origin: top;
}
.card-border:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,0,0,0.06); border-color: transparent; }
.card-border:hover::before { transform: scaleY(1); }

.card-gradient {
    background: linear-gradient(135deg, var(--color-primary), #004eb3);
    border-radius: 16px;
    padding: 2.5rem;
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 30px rgba(2,93,204,0.3);
}
.card-gradient:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(2,93,204,0.4); }

.card-elevated {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08), 0 2px 10px rgba(0,0,0,0.04);
    transition: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
    height: 100%;
    display: flex;
    flex-direction: column;
}
.card-elevated:hover { transform: translateY(-6px); box-shadow: 0 20px 60px rgba(0,0,0,0.12), 0 4px 16px rgba(0,0,0,0.06); }

.card-horizontal {
    background: white;
    border: 1.5px solid #e2e8f0;
    border-radius: 16px;
    padding: 2rem 2.5rem;
    display: flex;
    align-items: center;
    gap: 2rem;
    transition: all 0.3s ease;
}
.card-horizontal:hover { transform: translateX(6px); box-shadow: 0 8px 20px rgba(0,0,0,0.05); border-color: var(--color-secondary); }
.card-horizontal__icon { flex-shrink: 0; }
.card-horizontal__body { flex: 1; }

.card-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 700;
    background: rgba(2,93,204,0.08);
    color: var(--color-primary);
    padding: 0.2em 0.8em;
    border-radius: 4px;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    text-transform: uppercase;
}
.card-badge--outline { background: transparent; border: 1px solid var(--color-primary); }
.card-badge--light { background: rgba(255,255,255,0.2); color: white; }
.card-badge--elevated { background: rgba(2,93,204,0.06); }

/* --- Page Hero --- */
.page-hero {
    min-height: 60vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    padding-bottom: 0;
    position: relative;
    overflow: hidden;
}
.page-hero__inner {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem 0;
}
.page-hero__title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 700;
    color: var(--color-dark);
    margin: 0.8rem 0 1.5rem;
    line-height: 1.2;
}
.page-hero__lead {
    font-size: 1.1rem;
    color: var(--color-text-light);
    line-height: 2;
    max-width: 700px;
    margin: 0 auto 2rem;
}
.page-hero__note {
    display: inline-block;
    background: rgba(2,93,204,0.06);
    border: 1px solid rgba(2,93,204,0.15);
    border-radius: 8px;
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    color: var(--color-primary);
    font-family: var(--font-mono);
    margin-top: 1rem;
}

/* --- Samples Hero --- */
.section--samples-hero {
    background: #f8fafc;
    background-image:
        linear-gradient(rgba(203,213,225,0.3) 1px, transparent 1px),
        linear-gradient(90deg, rgba(203,213,225,0.3) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* --- Samples Grid --- */
.samples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}
@media(min-width: 1024px) { .samples-grid { grid-template-columns: 1fr 1fr; } }

.sample-card {
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    transition: transform 0.35s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.35s ease;
    border: 1px solid #f1f5f9;
}
.sample-card:hover { transform: translateY(-6px); box-shadow: 0 20px 50px rgba(0,0,0,0.1); }
.sample-card__image-wrap {
    position: relative;
    aspect-ratio: 16/9;
    overflow: hidden;
}
.sample-card__image {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.sample-card:hover .sample-card__image { transform: scale(1.05); }
.sample-card__overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: 1rem;
    background: linear-gradient(to top, rgba(0,0,0,0.6), transparent);
}
.sample-card__theme {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: white;
    font-weight: 700;
    letter-spacing: 0.05em;
}
.sample-card__body { padding: 2rem; }
.sample-card__tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.tag {
    display: inline-block;
    font-size: 0.75rem;
    background: #f1f5f9;
    color: var(--color-text-light);
    padding: 0.2em 0.8em;
    border-radius: 4px;
    font-family: var(--font-mono);
}
.sample-card__title { font-size: 1.3rem; font-weight: 700; color: var(--color-dark); margin-bottom: 1.2rem; }
.sample-card__features { list-style: none; margin-bottom: 1.5rem; }
.sample-card__features li { font-size: 0.9rem; color: var(--color-text-light); padding: 0.3rem 0; display: flex; align-items: center; }
.sample-card__footer { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; margin-top: 1.5rem; }
.sample-card__pages { font-size: 0.85rem; color: var(--color-text-light); font-family: var(--font-mono); }

/* Features Grid (samples page) */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}
@media(min-width: 1024px) { .features-grid { grid-template-columns: repeat(3, 1fr); } }
.feature-item {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.03);
    border: 1px solid #f1f5f9;
    transition: transform 0.3s ease;
}
.feature-item:hover { transform: translateY(-4px); }
.feature-icon {
    width: 48px; height: 48px;
    background: rgba(2,93,204,0.07);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    color: var(--color-primary);
    margin-bottom: 1rem;
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-title { font-size: 1.05rem; font-weight: 700; color: var(--color-dark); margin-bottom: 0.5rem; }
.feature-text { font-size: 0.9rem; color: var(--color-text-light); line-height: 1.7; }

/* CTA Section */
.cta-title { font-size: 2rem; font-weight: 700; color: var(--color-dark); margin-bottom: 1.5rem; line-height: 1.3; }
.cta-text { font-size: 1rem; color: var(--color-text); line-height: 2; margin-bottom: 2.5rem; }

/* --- Parts Hero --- */
.section--parts-hero {
    min-height: 70vh;
    background: var(--color-dark);
    background-image:
        radial-gradient(circle at 20% 50%, rgba(2,93,204,0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0,198,255,0.1) 0%, transparent 40%);
}
.section--parts-hero .section-header__subtitle { color: var(--color-secondary); }
.section--parts-hero .page-hero__title { color: white; }
.section--parts-hero .page-hero__lead { color: #94a3b8; }

/* TypeWriter — グリッドオーバーレイ方式（v28 ベース） */
.typewriter-wrapper {
    margin-top: 1rem;
    font-family: var(--font-mono);
    font-size: 1rem;
    color: #94a3b8;
}
.typewriter-prefix { color: #64748b; }

/* コンテナ：placeholder と visible レイヤーを同じグリッドセルに重ねる */
.typewriter-container {
    display: inline-grid;
    justify-items: start;
}
.typewriter-container > * {
    grid-area: 1 / 1;
    white-space: pre-wrap;
    word-break: break-word;
}

/* placeholder：文字透明・スペース確保専用 */
.typewriter-placeholder {
    color: transparent;
    pointer-events: none;
    user-select: none;
    visibility: hidden;
}

/* 表示テキスト */
.typewriter-text {
    color: var(--color-secondary);
    font-weight: 700;
}

/* カーソル：inline-block で文字直後に流れる */
.typewriter-cursor {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--color-secondary);
    animation: blink 1s step-end infinite;
    margin-left: 2px;
    vertical-align: text-bottom;
    margin-bottom: 0.1em;
}
@keyframes blink { 0%,100% { opacity:1; } 50% { opacity:0; } }

/* Parts Stats */
.parts-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem 3rem;
    justify-content: center;
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 1px solid rgba(255,255,255,0.08);
}
.parts-stat { text-align: center; }
.parts-stat__number {
    display: block;
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    line-height: 1;
    margin-bottom: 0.4rem;
}
.parts-stat__label { font-size: 0.8rem; color: #64748b; }

/* Parts Sub Title */
.parts-sub-title {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-secondary);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 1.5rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid #f1f5f9;
}

/* Typography Showcase */
.typo-font-compare {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}
.typo-font-block {
    background: #f8fafc;
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
}
.typo-font-name {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-secondary);
    font-weight: 700;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    text-transform: uppercase;
}
.typo-font-sample { font-size: 1.4rem; color: var(--color-dark); line-height: 1.5; margin-bottom: 1rem; }
.typo-font-desc { font-size: 0.85rem; color: var(--color-text-light); }

.typo-scale { display: flex; flex-direction: column; gap: 0; }
.typo-scale-row {
    display: flex; align-items: baseline;
    gap: 1.5rem; padding: 0.8rem 0;
    border-bottom: 1px solid #f1f5f9;
}
.ts-label {
    font-family: var(--font-mono); font-size: 0.75rem; font-weight: 700;
    color: var(--color-secondary); width: 40px; flex-shrink: 0;
}
.ts-size {
    font-family: var(--font-mono); font-size: 0.75rem;
    color: #94a3b8; width: 60px; flex-shrink: 0;
}
.ts-sample { color: var(--color-dark); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Color System */
.color-system-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}
.color-group { display: flex; flex-direction: column; gap: 0.8rem; }
.color-swatch-large {
    border-radius: 12px;
    padding: 1.5rem;
    color: white;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    min-height: 80px;
    justify-content: flex-end;
    cursor: default;
}
.color-swatch-hex { font-family: var(--font-mono); font-size: 0.8rem; font-weight: 700; }
.color-swatch-name { font-size: 0.75rem; opacity: 0.8; }

/* Glassmorphism Demo */
.glass-demo-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: stretch;
}
@media(max-width: 700px) { .glass-demo-wrap { grid-template-columns: 1fr; } }
.glass-demo-bg {
    background: linear-gradient(135deg, #dbeafe, #e0f2fe, #dbeafe);
    border-radius: 16px;
    padding: 2rem;
    display: flex; align-items: center; justify-content: center;
    min-height: 160px;
}
.glass-demo-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: 12px;
    padding: 1.5rem;
    width: 100%;
}
.glass-code {
    background: #0f172a;
    border-radius: 12px;
    padding: 1.5rem 2rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    color: #94a3b8;
    display: flex; align-items: center;
}
.glass-code code { color: #7dd3fc; }

/* Button Showcase */
.btn-showcase { margin-bottom: 2rem; }
.btn-showcase-row {
    display: flex; flex-wrap: wrap; gap: 1rem; align-items: flex-start; padding: 1.5rem;
    background: #f8fafc; border-radius: 12px; border: 1px solid #e2e8f0;
}

/* Cards Showcase */
.cards-showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}
@media(min-width: 1024px) { .cards-showcase-grid { grid-template-columns: repeat(4, 1fr); } }

/* Effects Showcase */
.effects-showcase-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}
@media(min-width: 1200px) { .effects-showcase-grid { grid-template-columns: repeat(3, 1fr); } }
.effect-card {
    background: #1e293b;
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 16px;
    padding: 2rem;
    transition: border-color 0.3s ease;
}
.effect-card:hover { border-color: rgba(0,198,255,0.3); }
.effect-card--coming { opacity: 0.5; }
.effect-card__header { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 1rem; }
.effect-card__header svg { width: 24px; height: 24px; }
.effect-card__title { font-size: 1.1rem; font-weight: 700; color: white; }
.effect-card__desc { font-size: 0.9rem; color: #94a3b8; line-height: 1.7; margin-bottom: 1.2rem; }
.effect-card__code {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--color-secondary);
    background: rgba(0,198,255,0.05);
    padding: 0.6rem 1rem;
    border-radius: 6px;
    border: 1px solid rgba(0,198,255,0.1);
}
.effect-card--new { border-color: rgba(0,198,255,0.15); }
.effect-card__badge {
    font-size: 0.65rem;
    font-family: var(--font-mono);
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--color-secondary);
    background: rgba(0,198,255,0.12);
    border: 1px solid rgba(0,198,255,0.25);
    border-radius: 3px;
    padding: 2px 6px;
    margin-left: auto;
}
.effect-card__demo {
    display: inline-block;
    margin-top: 0.8rem;
    font-size: 0.78rem;
    font-family: var(--font-mono);
    color: var(--color-secondary);
    text-decoration: none;
    border-bottom: 1px solid rgba(0,198,255,0.3);
    transition: border-color 0.2s ease;
}
.effect-card__demo:hover { border-color: var(--color-secondary); }

/* Background Overlay Catalog */
.overlay-catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1.2rem;
}
.overlay-card {
    background: #1e293b;
    border: 1px solid rgba(255,255,255,0.07);
    border-radius: 10px;
    padding: 1.4rem 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: border-color 0.3s ease;
}
.overlay-card:hover { border-color: rgba(0,198,255,0.25); }
.overlay-card--coming { opacity: 0.5; }
.overlay-card__icon {
    font-size: 1.6rem;
    line-height: 1;
    margin-bottom: 0.2rem;
}
.overlay-card__title {
    font-size: 0.95rem;
    font-weight: 700;
    color: white;
}
.overlay-card__desc {
    font-size: 0.82rem;
    color: #94a3b8;
    line-height: 1.6;
    flex: 1;
}
.overlay-card__link {
    margin-top: 0.5rem;
    display: inline-block;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--color-secondary);
    text-decoration: none;
    border-bottom: 1px solid rgba(0,198,255,0.3);
    width: fit-content;
    transition: border-color 0.2s ease;
}
.overlay-card__link:hover { border-color: var(--color-secondary); }
.overlay-card__link--soon {
    color: #475569;
    border-bottom-color: transparent;
    pointer-events: none;
}

/* Motion Showcase */
.motion-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
}
.motion-item {
    display: flex;
    gap: 3rem;
    align-items: center;
    padding: 3rem 0;
    border-bottom: 1px solid #f1f5f9;
}
.motion-item:last-child { border-bottom: none; }
@media(max-width: 700px) { .motion-item { flex-direction: column; gap: 1.5rem; } }
.motion-demo {
    flex: 0 0 220px;
    display: flex; align-items: center; justify-content: center;
    min-height: 100px;
}
.motion-info { flex: 1; }
.motion-title { font-size: 1.15rem; font-weight: 700; color: var(--color-dark); margin-bottom: 0.5rem; }
.motion-desc { font-size: 0.95rem; color: var(--color-text-light); line-height: 1.7; margin-bottom: 0.8rem; }
.motion-code {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--color-secondary);
    background: #f8fafc;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    border: 1px solid #e2e8f0;
}
.wave-demo-strip { width: 100%; overflow: hidden; }
.shine-demo {
    width: 200px; height: 40px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 20px;
    overflow: hidden;
    position: relative;
}
.shine-bar {
    position: absolute;
    top: 0; left: -100%;
    width: 60%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: shine-loop 2.5s ease-in-out infinite;
}
@keyframes shine-loop {
    0%   { left: -60%; }
    100% { left: 120%; }
}

/* --- Section Background Canvas --- */
.section-bg-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* --- Effect Preview Canvas (card-preview) --- */
.effect-preview-canvas {
    display: block;
    width: 100%;
    height: 180px;
    background: transparent;
    border-radius: 8px 8px 0 0;
}

/* --- Effect Catalog Card (large) --- */
.effect-catalog-card {
    background: #1e293b;
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 16px;
    overflow: hidden;
    min-height: 300px;
    transition: border-color 0.3s ease;
    display: flex;
    flex-direction: column;
}
.effect-catalog-card:hover { border-color: rgba(0,198,255,0.3); }
.effect-catalog-card--coming { opacity: 0.45; }
.effect-catalog-card__body {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.effect-catalog-card__cat {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-secondary);
    background: rgba(0,198,255,0.1);
    border: 1px solid rgba(0,198,255,0.2);
    border-radius: 3px;
    padding: 2px 7px;
    display: inline-block;
    margin-bottom: 0.6rem;
    align-self: flex-start;
}
.effect-catalog-card__title {
    font-size: 1.05rem;
    font-weight: 700;
    color: white;
    margin-bottom: 0.5rem;
}
.effect-catalog-card__desc {
    font-size: 0.88rem;
    color: #94a3b8;
    line-height: 1.7;
    flex: 1;
    margin-bottom: 0.8rem;
}
.effect-catalog-card__code {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-secondary);
    background: rgba(0,198,255,0.05);
    padding: 0.5rem 0.8rem;
    border-radius: 5px;
    border: 1px solid rgba(0,198,255,0.1);
    margin-bottom: 0.6rem;
}
.effect-catalog-card__demo {
    display: block;
    text-align: center;
    font-size: 0.78rem;
    font-family: var(--font-mono);
    font-weight: 600;
    letter-spacing: 0.05em;
    color: #060c18;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 999px;
    border: none;
    background: var(--color-secondary);
    margin-top: 0.6rem;
    transition: filter 0.2s ease, opacity 0.2s ease;
}
.effect-catalog-card__demo:hover {
    filter: brightness(1.15);
    opacity: 0.92;
}
.effect-card-toggle {
    position: absolute;
    top: 6px;
    right: 6px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: rgba(0, 0, 0, 0.35);
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.72rem;
    cursor: pointer;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    transition: background 0.2s ease, border-color 0.2s ease;
    line-height: 1;
    padding: 0;
}
.effect-card-toggle:hover {
    background: rgba(0, 0, 0, 0.55);
    border-color: rgba(255, 255, 255, 0.45);
}

/* --- Parts Category Cards --- */
.parts-category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}
@media (min-width: 1024px) { .parts-category-grid { grid-template-columns: repeat(3, 1fr); } }
.parts-category-card {
    background: white;
    border: 1.5px solid #e2e8f0;
    border-radius: 16px;
    padding: 2.5rem;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
}
.parts-category-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0;
    width: 4px; height: 100%;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-secondary));
    transform: scaleY(0);
    transition: transform 0.3s ease;
    transform-origin: top;
}
.parts-category-card:hover { transform: translateY(-4px); box-shadow: 0 12px 30px rgba(0,0,0,0.06); border-color: transparent; }
.parts-category-card:hover::before { transform: scaleY(1); }
.parts-category-card__num {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 0.8rem;
}
.parts-category-card__title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 0.6rem;
}
.parts-category-card__desc {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
    flex: 1;
}
.parts-category-card__link {
    margin-top: 1.5rem;
    font-size: 0.85rem;
    font-family: var(--font-mono);
    color: var(--color-primary);
    font-weight: 700;
}

/* --- Breadcrumb --- */
.breadcrumb {
    font-size: 0.85rem;
    font-family: var(--font-mono);
    color: #94a3b8;
    margin-bottom: 2rem;
}
.breadcrumb a { color: var(--color-secondary); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb__sep { margin: 0 0.5rem; color: #475569; }

/* Effects Showcase Grid (large variant) */
.effects-catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}
@media (min-width: 1200px) { .effects-catalog-grid { grid-template-columns: repeat(3, 1fr); } }

/* Form Additions */
.form-select { cursor: pointer; }
.check-group { display: flex; flex-direction: column; gap: 0.8rem; }
.check-label {
    display: flex; align-items: center; gap: 0.7rem;
    font-size: 0.95rem; color: var(--color-text); cursor: pointer;
}
.check-input {
    width: 18px; height: 18px;
    accent-color: var(--color-primary);
    cursor: pointer;
}
.form-showcase-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 900px;
    margin: 0 auto;
}
@media(max-width: 700px) { .form-showcase-grid { grid-template-columns: 1fr; gap: 2rem; } }

/* --- Apps Page --- */
.section--apps-hero {
    min-height: 55vh;
    background: var(--color-dark);
    background-image:
        radial-gradient(circle at 70% 60%, rgba(2,93,204,0.2) 0%, transparent 50%),
        radial-gradient(circle at 20% 30%, rgba(0,198,255,0.12) 0%, transparent 40%);
}
.app-layout {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 4rem;
    align-items: start;
}
.app-layout--full { grid-template-columns: 1fr; }
@media(max-width: 800px) { .app-layout { grid-template-columns: 1fr; gap: 2rem; } }
.app-desc__lead {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 1rem;
    line-height: 1.5;
}
.app-widget {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 10px 40px rgba(0,0,0,0.06);
    border: 1px solid #f1f5f9;
}
.widget-input-group { margin-bottom: 1.5rem; }

/* Golden Ratio */
.app-formula {
    display: inline-flex; align-items: baseline; gap: 0.5rem;
    background: rgba(2,93,204,0.05);
    border: 1px solid rgba(2,93,204,0.1);
    border-radius: 8px;
    padding: 0.8rem 1.2rem;
    margin-top: 1rem;
    font-family: var(--font-mono);
}
.formula-label { font-size: 1.4rem; font-weight: 700; color: var(--color-primary); }
.formula-eq { font-size: 0.9rem; color: var(--color-text-light); }
.formula-value { font-size: 1rem; font-weight: 700; color: var(--color-secondary); }
.gr-results { display: flex; flex-direction: column; gap: 0.8rem; margin: 1.5rem 0; }
.gr-result-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0.7rem 1rem; background: #f8fafc; border-radius: 8px;
    border: 1px solid #e2e8f0;
}
.gr-label { font-size: 0.9rem; color: var(--color-text-light); }
.gr-value { font-family: var(--font-mono); font-weight: 700; color: var(--color-primary); }
.gr-visualizer { margin-top: 1.5rem; overflow: hidden; }
.gr-rect-outer {
    background: rgba(2,93,204,0.08);
    border: 2px solid var(--color-primary);
    border-radius: 4px;
    display: flex; align-items: stretch;
    transition: all 0.4s ease;
    max-width: 100%;
}
.gr-rect-inner {
    background: rgba(2,93,204,0.15);
    border-right: 2px dashed rgba(2,93,204,0.4);
    display: flex; align-items: center; justify-content: center;
    transition: all 0.4s ease;
}
.gr-rect-label { font-family: var(--font-mono); font-size: 1.2rem; color: var(--color-primary); font-weight: 700; }

/* Color Palette */
.cp-palette { display: flex; flex-direction: column; gap: 1.2rem; margin-top: 1.5rem; }
.cp-row { display: flex; align-items: center; gap: 1rem; }
.cp-row-label { font-size: 0.8rem; color: var(--color-text-light); width: 140px; flex-shrink: 0; font-family: var(--font-mono); }
.cp-swatches { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.cp-swatch {
    width: 40px; height: 40px; border-radius: 8px; cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
}
.cp-swatch:hover { transform: scale(1.15); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
.cp-swatch.copied::after {
    content: '✓';
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    background: rgba(0,0,0,0.4); color: white; font-size: 1rem;
    border-radius: 8px;
}

/* Font Tester */
.font-compare-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-top: 0;
}
.font-card {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    padding: 2rem;
}
.font-card__label {
    font-family: var(--font-mono); font-size: 0.75rem; font-weight: 700;
    color: var(--color-secondary); letter-spacing: 0.05em; text-transform: uppercase;
    margin-bottom: 1rem;
}
.font-card__sample { font-size: 1.3rem; color: var(--color-dark); line-height: 1.5; margin-bottom: 1rem; min-height: 3em; }
.font-card__desc { font-size: 0.85rem; color: var(--color-text-light); line-height: 1.6; }

/* Modular Scale */
.ms-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-bottom: 2rem; }
@media(max-width: 500px) { .ms-controls { grid-template-columns: 1fr; } }
.ms-scale { display: flex; flex-direction: column; gap: 0; }
.ms-row {
    display: flex; align-items: baseline; gap: 1.5rem;
    padding: 0.6rem 0; border-bottom: 1px solid #f1f5f9;
}
.ms-name { font-family: var(--font-mono); font-size: 0.75rem; font-weight: 700; color: var(--color-secondary); width: 50px; flex-shrink: 0; }
.ms-size { font-family: var(--font-mono); font-size: 0.75rem; color: #94a3b8; width: 60px; flex-shrink: 0; }
.ms-sample { color: var(--color-dark); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }