:root { 
    --bg-body: #F5F5F7; --bg-card: #FFFFFF; --text-main: #1D1D1F; --text-sub: #86868B; 
    --accent: #007AFF; --accent-hover: #0062CC; 
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
    --divider: #E5E5EA; --glass: rgba(255,255,255,0.85);
}
[data-theme="dark"] { 
    --bg-body: #000000; --bg-card: #1C1C1E; --text-main: #F5F5F7; --text-sub: #98989D; 
    --accent: #0A84FF; --accent-hover: #409CFF; 
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.5);
    --divider: #38383A; --glass: rgba(28,28,30,0.85);
}

* { margin:0; padding:0; box-sizing:border-box; font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", sans-serif; -webkit-font-smoothing: antialiased; }
body { background: var(--bg-body); color: var(--text-main); transition: 0.4s; padding-bottom: 80px; }

/* Nav */
nav {
    position: sticky; top: 0; z-index: 100; height: 70px;
    background: var(--glass); backdrop-filter: blur(20px); border-bottom: 1px solid var(--divider);
    display: flex; align-items: center; justify-content: space-between; padding: 0 5%;
}
.brand { font-size: 1.4rem; font-weight: 700; letter-spacing: -0.5px; }

/* Switch */
.switch { position: relative; width: 56px; height: 30px; background: rgba(120,120,128,0.2); border-radius: 15px; cursor: pointer; transition: 0.3s; }
.switch-dot { 
    position: absolute; top: 2px; left: 2px; width: 26px; height: 26px; background: white; border-radius: 50%; 
    box-shadow: 0 2px 5px rgba(0,0,0,0.2); transition: 0.3s cubic-bezier(0.3, 1.5, 0.7, 1);
    display: grid; place-items: center;
}
[data-theme="dark"] .switch-dot { transform: translateX(26px); background: #333; }
.switch svg { width: 14px; height: 14px; color: #555; }
[data-theme="dark"] .switch svg { color: #fff; }

/* Tabs */
.tabs-scroll { padding: 20px 5%; overflow-x: auto; scrollbar-width: none; }
.tabs-scroll::-webkit-scrollbar { display: none; }
.tabs { display: flex; gap: 12px; }
.tab {
    padding: 10px 20px; background: var(--bg-card); border-radius: 20px; font-weight: 600; font-size: 0.95rem;
    color: var(--text-sub); cursor: pointer; box-shadow: var(--shadow-sm); transition: 0.3s; white-space: nowrap;
    border: 1px solid transparent;
}
.tab:hover { transform: translateY(-2px); }
.tab.active { background: var(--accent); color: white; box-shadow: 0 4px 12px rgba(0,122,255,0.3); }

/* Grid & Card */
.grid-container { 
    display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 24px; 
    padding: 10px 5%; max-width: 1400px; margin: 0 auto;
}
.card {
    background: var(--bg-card); border-radius: 24px; padding: 24px;
    display: flex; flex-direction: column; gap: 16px; position: relative;
    box-shadow: var(--shadow-sm); border: 1px solid var(--divider);
    transition: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    opacity: 0; transform: scale(0.95); animation: popIn 0.5s forwards;
}
@keyframes popIn { to { opacity: 1; transform: scale(1); } }
.card:hover { transform: translateY(-5px) scale(1.01); box-shadow: var(--shadow-md); z-index: 2; border-color: rgba(128,128,128,0.2); }

.card-top { display: flex; gap: 16px; align-items: flex-start; }
.card-icon { width: 72px; height: 72px; border-radius: 18px; object-fit: cover; box-shadow: 0 4px 10px rgba(0,0,0,0.1); border: 1px solid rgba(0,0,0,0.05); }
.card-meta { flex: 1; }
.card-title { font-size: 1.2rem; font-weight: 700; color: var(--text-main); margin-bottom: 4px; line-height: 1.2; }
.card-sub { font-size: 0.9rem; color: var(--text-sub); font-weight: 500; }
.card-desc { font-size: 0.9rem; color: var(--text-sub); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.card-footer { display: flex; justify-content: space-between; align-items: flex-end; margin-top: auto; }

/* Download Info & Button */
.dl-info { font-size: 0.8rem; font-weight: 600; color: var(--text-sub); opacity: 0.8; padding-bottom: 5px; }

.get-btn {
    background: var(--accent); color: white; border: none; 
    padding: 10px 24px; border-radius: 30px; font-weight: 700; font-size: 0.95rem;
    cursor: pointer; transition: 0.2s; box-shadow: 0 4px 10px rgba(0,122,255,0.25);
    min-width: 86px;
}
.get-btn:hover { background: var(--accent-hover); transform: scale(1.03); box-shadow: 0 6px 14px rgba(0,122,255,0.35); }
.get-btn:active { transform: scale(0.95); }

.get-btn.loading { color: transparent; pointer-events: none; position: relative; }
.get-btn.loading::after {
    content: ""; position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
    width: 16px; height: 16px; border: 2px solid rgba(255,255,255,0.9);
    border-top-color: transparent; border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: translate(-50%, -50%) rotate(360deg); } }

/* Modal */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.4); backdrop-filter: blur(15px);
    z-index: 200; display: flex; align-items: center; justify-content: center;
    opacity: 0; pointer-events: none; transition: 0.3s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal {
    background: var(--bg-card); width: 90%; max-width: 500px; padding: 32px; border-radius: 28px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.3); transform: scale(0.9); transition: 0.3s cubic-bezier(0.19, 1, 0.22, 1);
}
.modal-overlay.open .modal { transform: scale(1); }