/* ============================================================
   TopBestProducts — stylesheet
   Tema: "sinyal/nabız" — koyu zemin, tek canlı vurgu rengi.
   Konu gerçek zamanlı veri akışı olduğu için tasarım bir
   sismograf/radar ekranı hissi taşıyor.
   ============================================================ */

:root {
    --bg: #0b0d10;
    --bg-elevated: #12151a;
    --bg-card: #15181d;
    --border: #232830;
    --text-primary: #e8eaed;
    --text-secondary: #8b94a3;
    --text-tertiary: #565d68;
    --pulse: #5ee6c4;       /* tek canlı vurgu rengi - sinyal yeşili */
    --pulse-dim: #2a4a42;
    --pulse-glow: rgba(94, 230, 196, 0.18);

    --font-display: 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif;
    --font-body: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

    --radius: 3px;
    --max-width: 760px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

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

.site-header {
    border-bottom: 1px solid var(--border);
    background: var(--bg-elevated);
    position: sticky;
    top: 0;
    z-index: 20;
}

.site-header__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand__mark {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--pulse);
    box-shadow: 0 0 0 0 var(--pulse-glow);
    animation: pulse-ring 2.4s ease-out infinite;
    flex-shrink: 0;
}

@keyframes pulse-ring {
    0%   { box-shadow: 0 0 0 0 var(--pulse-glow); }
    70%  { box-shadow: 0 0 0 8px rgba(94, 230, 196, 0); }
    100% { box-shadow: 0 0 0 0 rgba(94, 230, 196, 0); }
}

@media (prefers-reduced-motion: reduce) {
    .brand__mark { animation: none; }
}

.brand__name {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 19px;
    letter-spacing: -0.01em;
}

.brand__tagline {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-tertiary);
    display: none;
}

@media (min-width: 560px) {
    .brand__tagline { display: block; }
}

.header__meta {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-secondary);
    text-align: right;
    line-height: 1.4;
}

.header__meta strong {
    color: var(--pulse);
    font-weight: 500;
}

/* ---------------- Layout ---------------- */

.page {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px 60px;
}

.feed-intro {
    padding: 28px 0 18px;
    border-bottom: 1px dashed var(--border);
    margin-bottom: 4px;
}

.feed-intro__label {
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--pulse);
    margin: 0 0 6px;
}

.feed-intro h1 {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 600;
    margin: 0 0 8px;
    letter-spacing: -0.01em;
}

.feed-intro p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
}

/* ---------------- Feed / cards ---------------- */

.feed {
    display: flex;
    flex-direction: column;
}

.feed-item {
    display: block;
    padding: 18px 0;
    border-bottom: 1px solid var(--border);
    transition: padding-left 0.15s ease;
}

.feed-item:hover {
    padding-left: 6px;
}

.feed-item:first-child {
    padding-top: 22px;
}

.feed-item__row {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 6px;
}

.feed-item__time {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--pulse);
    white-space: nowrap;
    flex-shrink: 0;
}

.feed-item__region {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border: 1px solid var(--border);
    padding: 1px 6px;
    border-radius: var(--radius);
    flex-shrink: 0;
}

.feed-item__title {
    font-family: var(--font-display);
    font-size: 19px;
    font-weight: 600;
    margin: 0 0 6px;
    letter-spacing: -0.005em;
}

.feed-item:hover .feed-item__title {
    color: var(--pulse);
}

.feed-item__summary {
    color: var(--text-secondary);
    font-size: 14.5px;
    margin: 0;
}

.feed-item__new-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 10px;
    background: var(--pulse-dim);
    color: var(--pulse);
    padding: 2px 6px;
    border-radius: var(--radius);
    margin-left: 8px;
    vertical-align: middle;
}

/* In-article ad slot */
.ad-slot {
    margin: 22px 0;
    padding: 16px;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    text-align: center;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.empty-state {
    padding: 60px 0;
    text-align: center;
    color: var(--text-tertiary);
}

.empty-state__mark {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--pulse);
    margin-bottom: 8px;
}

/* ---------------- Article page ---------------- */

.article-header {
    padding: 30px 0 20px;
}

.article-header__back {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 18px;
    display: inline-block;
}

.article-header__back:hover { color: var(--pulse); }

.article-header__eyebrow {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 12px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-tertiary);
}

.article-header__eyebrow .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--pulse);
}

.article-header h1 {
    font-family: var(--font-display);
    font-size: 30px;
    font-weight: 700;
    line-height: 1.25;
    margin: 0 0 14px;
    letter-spacing: -0.01em;
}

.article-header__keyword {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
}

.article-header__keyword strong {
    color: var(--pulse);
}

.article-body {
    font-size: 16.5px;
    line-height: 1.75;
    color: var(--text-primary);
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
}

.article-body p {
    margin: 0 0 18px;
}

.article-footer {
    padding: 24px 0;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
    font-size: 11px;
}

/* ---------------- Footer ---------------- */

.site-footer {
    border-top: 1px solid var(--border);
    padding: 24px 20px;
    text-align: center;
    color: var(--text-tertiary);
    font-family: var(--font-mono);
    font-size: 11px;
}

/* ---------------- Misc ---------------- */

.skip-link {
    position: absolute;
    left: -9999px;
}

.skip-link:focus {
    left: 12px;
    top: 12px;
    background: var(--pulse);
    color: var(--bg);
    padding: 8px 12px;
    border-radius: var(--radius);
    z-index: 100;
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--pulse);
    outline-offset: 2px;
}