:root {
    --ink: #160b2e;
    --ink-soft: #5b5178;
    --bg: #f4f1ff;
    --surface: #ffffff;
    --line: #e6dffb;

    --accent: #6a3dff;
    --youtube: #ff1f4b;
    --reddit: #ff6a00;
    --rt: #00c389;
    --sun: #ffc24b;

    --display: "Space Grotesk", system-ui, sans-serif;
    --body: "Plus Jakarta Sans", system-ui, -apple-system, sans-serif;
    --mono: "JetBrains Mono", ui-monospace, monospace;
}

/* ---------- Shell ---------- */

.app-body {
    position: relative;
    min-height: 100vh;
    background-color: var(--bg);
    color: var(--ink);
    font-family: var(--body);
    -webkit-font-smoothing: antialiased;
}

.app-body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(42rem 30rem at 6% -8%, rgba(106, 61, 255, 0.18), transparent 62%),
        radial-gradient(36rem 26rem at 98% -4%, rgba(255, 31, 75, 0.14), transparent 60%),
        radial-gradient(34rem 26rem at 52% 112%, rgba(0, 195, 137, 0.16), transparent 62%),
        radial-gradient(30rem 22rem at 82% 78%, rgba(255, 106, 0, 0.12), transparent 60%);
}

.site-header,
main {
    position: relative;
    z-index: 1;
}

/* ---------- Header ---------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.78);
    border-bottom: 1px solid var(--line);
    backdrop-filter: saturate(180%) blur(16px);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
}

.brand-mark {
    width: 26px;
    height: 26px;
    border-radius: 9px;
    background: conic-gradient(from 220deg, var(--accent), var(--youtube), var(--reddit), var(--rt), var(--accent));
    box-shadow: 0 6px 16px rgba(106, 61, 255, 0.4);
}

.brand-text {
    font-family: var(--display);
    font-weight: 700;
    font-size: 1.12rem;
    letter-spacing: -0.01em;
    color: var(--ink);
}

.brand-text em {
    font-style: normal;
    background: linear-gradient(90deg, var(--accent), var(--youtube) 55%, var(--reddit));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.header-meta {
    gap: 0.55rem;
    font-size: 0.76rem;
    color: var(--ink-soft);
}

.header-meta .sep {
    opacity: 0.4;
}

.pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--rt);
    animation: pulse 2.2s ease-out infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(0, 195, 137, 0.55); }
    70% { box-shadow: 0 0 0 9px rgba(0, 195, 137, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 195, 137, 0); }
}

.spectrum-rail {
    height: 5px;
    background: linear-gradient(90deg,
        var(--accent), var(--youtube) 32%, var(--reddit) 60%, var(--sun) 78%, var(--rt));
}

/* ---------- Filter pills ---------- */

.filter-pills {
    gap: 0.5rem;
}

.filter-pill {
    --pill: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.42rem 0.95rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.7);
    color: var(--ink);
    font-weight: 600;
    font-size: 0.86rem;
    text-decoration: none;
    white-space: nowrap;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.filter-pill .pill-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--pill);
    transition: background 0.15s ease;
}

.filter-pill:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 18px -10px var(--pill);
    color: var(--ink);
}

.filter-pill.active {
    background: var(--pill);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 10px 22px -10px var(--pill);
}

.filter-pill.active .pill-dot {
    background: rgba(255, 255, 255, 0.9);
}

.refresh-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.32rem 0.7rem;
    border-radius: 999px;
    background: rgba(106, 61, 255, 0.1);
    color: var(--accent);
    font-size: 0.72rem;
    font-weight: 500;
}

/* ---------- Time range ---------- */

.toolbar-label {
    font-size: 0.66rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--ink-soft);
    padding-right: 0.15rem;
}

.range-pills {
    gap: 0.35rem;
}

.range-pill {
    display: inline-flex;
    align-items: center;
    padding: 0.32rem 0.75rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.7);
    color: var(--ink-soft);
    font-size: 0.78rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.range-pill:hover {
    color: var(--ink);
    border-color: var(--accent);
    transform: translateY(-1px);
}

.range-pill.active {
    background: var(--accent);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 10px 22px -10px var(--accent);
}

/* ---------- Cards ---------- */

.feed-card {
    --src: var(--accent);
    position: relative;
    border: 1px solid var(--line);
    border-top: 4px solid var(--src);
    border-radius: 18px;
    background: var(--surface);
    overflow: hidden;
    box-shadow: 0 1px 2px rgba(22, 11, 46, 0.04), 0 14px 34px -26px rgba(22, 11, 46, 0.5);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.feed-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 44px -20px rgba(22, 11, 46, 0.4);
    box-shadow: 0 20px 44px -20px color-mix(in srgb, var(--src) 55%, transparent);
}

.feed-thumb-link {
    position: relative;
    display: block;
    overflow: hidden;
    background: #efeaff;
}

.feed-thumb-link::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(to top, rgba(22, 11, 46, 0.5), transparent 52%);
}

.feed-thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.feed-card:hover .feed-thumb {
    transform: scale(1.06);
}

.thumb-tag,
.source-chip {
    font-family: var(--mono);
    font-size: 0.64rem;
    font-weight: 600;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: #fff;
    background: var(--src);
}

.thumb-tag {
    position: absolute;
    left: 0.7rem;
    bottom: 0.7rem;
    z-index: 1;
    padding: 0.24rem 0.6rem;
    border-radius: 999px;
    box-shadow: 0 6px 16px -6px rgba(22, 11, 46, 0.6);
}

.source-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.55rem;
    border-radius: 999px;
}

.feed-card .card-body {
    padding: 1rem 1.1rem 1.1rem;
}

.feed-name {
    font-size: 0.68rem;
    letter-spacing: 0.02em;
    color: var(--ink-soft);
}

.feed-card .card-title {
    font-family: var(--display);
    font-size: 1.02rem;
    font-weight: 600;
    line-height: 1.32;
}

.feed-card .card-title a {
    color: var(--ink);
    text-decoration: none;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color 0.15s ease;
}

.feed-card .card-title a:hover {
    color: var(--src);
}

.feed-card .card-text {
    font-size: 0.86rem;
    line-height: 1.55;
    color: var(--ink-soft);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-footer-meta {
    border-top: 1px dashed var(--line);
}

.author {
    font-size: 0.78rem;
    color: var(--ink-soft);
}

.timestamp {
    font-size: 0.72rem;
    font-weight: 500;
    color: var(--src);
}

.mono {
    font-family: var(--mono);
}

/* ---------- Empty state ---------- */

.empty-state {
    padding: 4.5rem 1rem;
    color: var(--ink-soft);
}

.empty-mark {
    width: 58px;
    height: 58px;
    margin: 0 auto 1rem;
    border-radius: 20px;
    background: conic-gradient(from 220deg, var(--accent), var(--youtube), var(--reddit), var(--rt), var(--accent));
    filter: saturate(1.1);
    animation: spin 12s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.empty-title {
    font-family: var(--display);
    font-size: 1.15rem;
    color: var(--ink);
}

/* ---------- Button ---------- */

.btn-energy {
    border: 0;
    border-radius: 999px;
    padding: 0.7rem 1.7rem;
    font-family: var(--display);
    font-weight: 600;
    color: #fff;
    background: linear-gradient(100deg, var(--accent), var(--youtube) 48%, var(--reddit) 78%, var(--rt));
    background-size: 160% 100%;
    box-shadow: 0 14px 30px -14px rgba(106, 61, 255, 0.8);
    transition: transform 0.15s ease, background-position 0.4s ease, box-shadow 0.15s ease;
}

.btn-energy:hover,
.btn-energy:focus {
    color: #fff;
    transform: translateY(-2px);
    background-position: 100% 0;
    box-shadow: 0 18px 36px -14px rgba(255, 31, 75, 0.7);
}

.btn-energy:disabled {
    opacity: 0.65;
    transform: none;
    color: #fff;
}

.alert-soft {
    border: 1px solid #ffe1a8;
    border-radius: 14px;
    background: #fff8ea;
    color: #7a5a12;
}

/* ---------- Focus & motion ---------- */

a:focus-visible,
button:focus-visible {
    outline: 3px solid rgba(106, 61, 255, 0.55);
    outline-offset: 2px;
    border-radius: 8px;
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
}