/* ===== DECMB MoodLab · 情绪实验室 ===== */
:root {
    --bg: #0a0a14;
    --bg-soft: #12121f;
    --text: #f2f2f7;
    --text-soft: rgba(242, 242, 247, 0.66);
    --text-faint: rgba(242, 242, 247, 0.42);
    --glass: rgba(255, 255, 255, 0.06);
    --glass-strong: rgba(255, 255, 255, 0.10);
    --border: rgba(255, 255, 255, 0.10);
    --radius: 28px;

    /* 情绪色 */
    --dopamine: #ff3ea5;
    --endorphin: #ff8a3d;
    --caffeine: #ffd23d;
    --melatonin: #5b8bff;
}

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

html, body {
    min-height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

body {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== 背景光晕 ===== */
.bg-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(90px);
    opacity: 0.35;
    z-index: 0;
    pointer-events: none;
/*    animation: float 14s ease-in-out infinite;*/
}
.orb-1 { width: 420px; height: 420px; top: -120px; left: -100px; background: var(--dopamine); }
.orb-2 { width: 380px; height: 380px; bottom: -120px; right: -80px; background: var(--melatonin); animation-delay: -5s; }
.orb-3 { width: 300px; height: 300px; top: 45%; left: 55%; background: var(--endorphin); animation-delay: -9s; }

.page-mood .orb-1, .page-mood .orb-2 { opacity: 0.30; }
.page-mood .orb-3 { display: none; }

.mood-dopamine .orb-1 { background: var(--dopamine); }
.mood-endorphin .orb-1 { background: var(--endorphin); }
.mood-caffeine .orb-1 { background: var(--caffeine); }
.mood-melatonin .orb-1 { background: var(--melatonin); }

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(40px, -30px) scale(1.08); }
    66% { transform: translate(-30px, 40px) scale(0.94); }
}

/* ===== 主页 ===== */
.home-main {
    position: relative;
    z-index: 1;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px 40px;
    max-width: 960px;
    margin: 0 auto;
    width: 100%;
}


.hero { text-align: center; margin-bottom: 52px; }

.eyebrow {
    font-size: 13px;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: 18px;
}

.hero h1 {
    font-size: clamp(30px, 7vw, 50px);
    font-weight: 700;
    line-height: 1.16;
    letter-spacing: -0.02em;
    background: linear-gradient(100deg, #fff 30%, rgba(255,255,255,0.55) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: #ff7ac0;
}

.hero h2 {
    font-size: clamp(20px, 7vw, 30px);
    font-weight: 300;
    line-height: 1.16;
    letter-spacing: -0.02em;
    background: linear-gradient(100deg, #fff 30%, rgba(255,255,255,0.55) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    margin-top: 16px;
    font-size: clamp(14px, 2.6vw, 16px);
    color: var(--text-soft);
    line-height: 1.7;
}

/* 按钮网格 */
.grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    width: 100%;
    max-width: 760px;
}

.card {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 190px;
    padding: 26px 24px;
    border-radius: var(--radius);
    background: var(--glass);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--border);
    text-decoration: none;
    color: var(--text);
    overflow: hidden;
    transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
                border-color 0.35s ease,
                box-shadow 0.35s ease;
}

.card-glow {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 0;
}

.card-dopamine .card-glow { background: radial-gradient(circle at 80% 20%, rgba(255,62,165,0.30), transparent 60%); }
.card-endorphin .card-glow { background: radial-gradient(circle at 80% 20%, rgba(255,138,61,0.30), transparent 60%); }
.card-caffeine .card-glow { background: radial-gradient(circle at 80% 20%, rgba(255,210,61,0.26), transparent 60%); }
.card-melatonin .card-glow { background: radial-gradient(circle at 80% 20%, rgba(91,139,255,0.30), transparent 60%); }

.card > * { position: relative; z-index: 1; }

.card-emoji {
    font-size: 44px;
    line-height: 1;
    margin-bottom: 24px;
    display: block;
}

.card-title {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.card-desc {
    margin-top: 8px;
    font-size: 14px;
    color: var(--text-soft);
}

.card-arrow {
    margin-top: 22px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.06em;
    opacity: 0.55;
    transition: opacity 0.3s, transform 0.3s;
}

.card:hover { transform: translateY(-6px); border-color: rgba(255,255,255,0.22); }
.card:hover .card-glow { opacity: 1; }
.card:hover .card-arrow { opacity: 1; transform: translateX(4px); }

.card-dopamine:hover { box-shadow: 0 20px 50px -20px rgba(255,62,165,0.6); }
.card-endorphin:hover { box-shadow: 0 20px 50px -20px rgba(255,138,61,0.6); }
.card-caffeine:hover { box-shadow: 0 20px 50px -20px rgba(255,210,61,0.5); }
.card-melatonin:hover { box-shadow: 0 20px 50px -20px rgba(91,139,255,0.6); }

/* 按下效果 */
.card:active { transform: translateY(-2px) scale(0.99); }

.home-footer {
    margin-top: 48px;
    font-size: 12px;
    color: var(--text-faint);
    letter-spacing: 0.04em;
}

/* ===== 二级页 ===== */
.mood-main {
    position: relative;
    z-index: 1;
    flex: 1;
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 20px 60px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px 0;
    position: sticky;
    top: 0;
    background: linear-gradient(180deg, var(--bg) 60%, transparent);
    z-index: 10;
}

.back {
    color: var(--text-soft);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.25s;
}
.back:hover { color: var(--text); }

.brand {
    font-size: 13px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-faint);
}

.mood-hero {
    text-align: center;
    padding: 30px 0 44px;
}

.mood-emoji { font-size: 52px; }

.mood-hero h1 {
    font-size: clamp(38px, 8vw, 60px);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 6px 0 14px;
}

.mood-dopamine .mood-hero h1 { color: #ff7ac0; }
.mood-endorphin .mood-hero h1 { color: #ffae6b; }
.mood-caffeine .mood-hero h1 { color: #ffe066; }
.mood-melatonin .mood-hero h1 { color: #8faeff; }

.mood-tagline {
    font-size: 15px;
    color: var(--text-soft);
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.7;
}

/* 视频网格 */
.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.video-card {
    background: var(--glass);
    border: 1px solid var(--border);
    border-radius: 20px;
    overflow: hidden;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    animation: rise 0.5s cubic-bezier(0.2, 0.8, 0.2, 1) backwards;
}

@keyframes rise {
    from { opacity: 0; transform: translateY(18px); }
    to { opacity: 1; transform: translateY(0); }
}

.video-card:hover { transform: translateY(-4px); border-color: rgba(255,255,255,0.2); }
.mood-dopamine .video-card:hover { box-shadow: 0 16px 40px -20px rgba(255,62,165,0.5); }
.mood-endorphin .video-card:hover { box-shadow: 0 16px 40px -20px rgba(255,138,61,0.5); }
.mood-caffeine .video-card:hover { box-shadow: 0 16px 40px -20px rgba(255,210,61,0.4); }
.mood-melatonin .video-card:hover { box-shadow: 0 16px 40px -20px rgba(91,139,255,0.5); }

.thumb-wrap {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    cursor: pointer;
}

.thumb-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease, opacity 0.3s ease;
}

.thumb-wrap:hover img { transform: scale(1.06); }

.play-btn {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.0);
    transition: background 0.3s ease;
}

.play-btn::after {
    content: '';
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255,255,255,0.94);
    box-shadow: 0 6px 20px rgba(0,0,0,0.35);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23111'%3E%3Cpath d='M8 5v14l11-7z'/%3E%3C/svg%3E");
    background-size: 26px;
    background-position: 55% center;
    background-repeat: no-repeat;
    opacity: 0.92;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.thumb-wrap:hover .play-btn { background: rgba(0,0,0,0.12); }
.thumb-wrap:hover .play-btn::after { transform: scale(1.12); opacity: 1; }

/* 播放器状态 */
.player-wrap { position: relative; aspect-ratio: 16 / 9; }
.player-wrap iframe { width: 100%; height: 100%; border: 0; display: block; }

.video-info { padding: 16px 18px 18px; }
.video-title { font-size: 15px; font-weight: 600; line-height: 1.5; margin-bottom: 6px; }
.video-channel { font-size: 13px; color: var(--text-faint); }

.mood-footer {
    text-align: center;
    margin-top: 44px;
}
.footer-btn {
    display: inline-block;
    padding: 12px 26px;
    border-radius: 999px;
    background: var(--glass-strong);
    border: 1px solid var(--border);
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: background 0.3s, transform 0.3s;
}
.footer-btn:hover { background: rgba(255,255,255,0.16); transform: translateY(-2px); }

/* ===== 响应式 ===== */
@media (max-width: 620px) {
    .grid { grid-template-columns: 1fr; }
    .card { min-height: 150px; padding: 22px; }
    .card-emoji { font-size: 38px; margin-bottom: 16px; }
    .video-grid { grid-template-columns: 1fr; }
}

@media (max-width: 400px) {
    .hero h1 { font-size: 32px; }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

.thumbnail {
    position: relative;
    cursor: pointer;
}
.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 48px;
    color: white;
    background: rgba(0,0,0,0.6);
    border-radius: 12px;
    padding: 10px 20px;
    transition: all 0.2s;
}
.thumbnail:hover .play-button {
    background: rgba(255,0,0,0.8);
    transform: translate(-50%, -50%) scale(1.1);
}