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

/* ── Design tokens ──────────────────────────────────────────────────────────── */
:root {
  --bg:         #0d0f17;
  --bg-card:    #171a26;
  --bg-strip:   #111420;
  --border:     #252838;
  --border-hi:  #343754;
  --text:       #e4e7f0;
  --muted:      #8a90a3;
  --green:      #00d6a0;
  --red:        #ff4f4f;
  --orange:     #f7931a;
  --blue:       #4e9af1;
  --radius:     8px;
  --font:       'Inter', 'Segoe UI', system-ui, sans-serif;
  --header-h:   54px;
}

/* ── Base ───────────────────────────────────────────────────────────────────── */
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
img { display: block; }

/* ── Header ─────────────────────────────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 20px;
  background: var(--bg-strip);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  font-size: 17px;
}
.logo-icon    { font-size: 20px; line-height: 1; }
.logo-text    { letter-spacing: -0.2px; }
.logo-bitcoin { color: var(--orange); }
.logo-miners  { color: var(--text); }
.logo-hub     { color: var(--text); }

.header-nav { display: flex; gap: 18px; }
.header-nav a { color: var(--muted); font-size: 14px; transition: color .15s; }
.header-nav a:hover { color: var(--text); }

/* ── Ticker strip ───────────────────────────────────────────────────────────── */
.ticker-strip {
  overflow: hidden;
  padding: 8px 0;
  background: var(--bg-strip);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: var(--header-h);
  z-index: 100;
}

.ticker-track {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  animation: ticker-scroll 35s linear infinite;
  padding: 0 6px;
}

.ticker-strip:hover .ticker-track {
  animation-play-state: paused;
}

@keyframes ticker-scroll {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.ticker-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  padding: 5px 12px;
  border-radius: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  white-space: nowrap;
  transition: border-color .15s, background .15s;
}
.ticker-chip:hover  { border-color: var(--border-hi); background: #1c2030; }
.ticker-chip.active { border-color: var(--orange); }

.chip-symbol { font-weight: 700; font-size: 12px; letter-spacing: .3px; }
.chip-price  { font-size: 13px; font-weight: 600; }
.chip-change { font-size: 11px; font-weight: 500; }

.up   { color: var(--green); }
.down { color: var(--red);   }

/* ── Main layout ────────────────────────────────────────────────────────────── */
.site-main {
  max-width: 1440px;
  margin: 0 auto;
  padding: 28px 20px 60px;
}

/* ── Section headers ────────────────────────────────────────────────────────── */
.section-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.section-header h2 {
  font-size: 22px;
  font-weight: 700;
  white-space: nowrap;
  padding-top: 3px;
  color: #f7931a;
}

/* ── Intro ──────────────────────────────────────────────────────────────────── */
.site-intro {
  max-width: 760px;
  margin-bottom: 36px;
}
.site-intro p {
  font-size: 15px;
  line-height: 1.7;
  color: #b0b8c1;
}

/* ── Charts ─────────────────────────────────────────────────────────────────── */
.charts-section { margin-bottom: 40px; }

.chart-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chart-tab {
  padding: 4px 11px;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all .15s;
}
.chart-tab:hover  { border-color: var(--border-hi); }
.chart-tab.active { background: var(--orange); color: #000; border-color: var(--orange); }

.chart-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.chart-info-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.ci-symbol { font-size: 20px; font-weight: 700; }
.ci-name   { font-size: 13px; color: var(--muted); }
.ci-spacer { flex: 1; }
.ci-price  { font-size: 22px; font-weight: 700; }
.ci-change { font-size: 14px; font-weight: 600; }

.chart-intervals {
  display: flex;
  gap: 5px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--border);
}
.interval-btn {
  padding: 3px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 700;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--muted);
  transition: all .15s;
}
.interval-btn:hover  { border-color: var(--border-hi); color: var(--text); }
.interval-btn.active { background: var(--orange); color: #000; border-color: var(--orange); }

#chart-wrap { position: relative; }
#chart-canvas { width: 100%; height: 340px; }

.chart-msg {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 340px;
  color: var(--muted);
  font-size: 14px;
}

/* ── News section ───────────────────────────────────────────────────────────── */
.news-section-header { align-items: center; }

.news-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.filter-btn {
  padding: 4px 11px;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--muted);
  transition: all .15s;
}
.filter-btn:hover  { border-color: var(--border-hi); color: var(--text); }
.filter-btn.active { background: var(--blue); color: #fff; border-color: var(--blue); }

/* ── News grid ──────────────────────────────────────────────────────────────── */
.news-feed {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
}

.feed-msg {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 0;
  color: var(--muted);
  font-size: 14px;
}

/* ── News card ──────────────────────────────────────────────────────────────── */
.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color .15s, transform .12s;
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  border-color: var(--border-hi);
  transform: translateY(-2px);
}
.news-card > a {
  display: flex;
  flex-direction: column;
  height: 100%;
}

/* Thumbnail */
.news-thumb {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: var(--border);
}
.news-thumb-placeholder {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #1c1f2e 0%, #242840 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  color: var(--border-hi);
}

/* Card body */
.news-body {
  padding: 12px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.news-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.source-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 3px;
  background: var(--border);
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .5px;
}
.news-time {
  font-size: 11px;
  color: var(--muted);
}

.ticker-tags { display: flex; gap: 4px; flex-wrap: wrap; }
.ticker-tag {
  font-size: 10px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 3px;
  background: rgba(247,147,26,.1);
  color: var(--orange);
  border: 1px solid rgba(247,147,26,.2);
}

.news-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.45;
  color: var(--text);
  flex: 1;
}

.news-excerpt {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Load more ──────────────────────────────────────────────────────────────── */
.load-more-btn {
  display: block;
  width: 100%;
  margin-top: 20px;
  padding: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 14px;
  transition: all .15s;
}
.load-more-btn:hover { border-color: var(--orange); color: var(--text); }

/* ── Footer ─────────────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 22px 20px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
  margin-top: 40px;
}
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--orange); }
.footer-links { margin-top: 8px; display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }

/* ── Content pages (About / Privacy / Contact) ──────────────────────────────── */
.content-page {
  max-width: 780px;
  margin: 0 auto;
  padding: 44px 20px 80px;
}
.content-page h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--orange);
  margin-bottom: 26px;
}
.content-page h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin: 32px 0 10px;
}
.content-page p { color: var(--muted); margin-bottom: 14px; line-height: 1.75; }
.content-page ul { color: var(--muted); padding-left: 20px; margin-bottom: 14px; line-height: 1.75; }
.content-page a { color: var(--orange); }
.content-page a:hover { text-decoration: underline; }
.content-page .last-updated { font-size: 12px; color: var(--muted); margin-bottom: 28px; }

/* Contact form */
.contact-form { display: flex; flex-direction: column; gap: 16px; margin-top: 10px; }
.contact-form label { font-size: 13px; font-weight: 600; color: var(--text); display: block; margin-bottom: 5px; }
.contact-form input,
.contact-form textarea {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  padding: 10px 14px;
  transition: border-color .15s;
}
.contact-form input:focus,
.contact-form textarea:focus { outline: none; border-color: var(--orange); }
.contact-form textarea { height: 150px; resize: vertical; }
.contact-form button[type=submit] {
  align-self: flex-start;
  padding: 11px 28px;
  background: var(--orange);
  color: #000;
  font-weight: 700;
  font-size: 14px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: opacity .15s;
}
.contact-form button[type=submit]:hover { opacity: .85; }
.form-success {
  padding: 16px 20px;
  background: rgba(0,214,160,.08);
  border: 1px solid rgba(0,214,160,.25);
  border-radius: var(--radius);
  color: var(--green);
  font-size: 14px;
}
.form-error {
  padding: 16px 20px;
  background: rgba(255,79,79,.08);
  border: 1px solid rgba(255,79,79,.25);
  border-radius: var(--radius);
  color: var(--red);
  font-size: 14px;
}

/* ── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 700px) {
  .site-main { padding: 20px 12px 50px; }
  .news-feed  { grid-template-columns: 1fr; }
  #chart-canvas { height: 260px; }
  .chart-msg    { height: 260px; }
  .section-header { flex-direction: column; gap: 10px; }
  .ci-price { font-size: 18px; }
  .ci-symbol { font-size: 17px; }
}

@media (max-width: 480px) {
  .charts-section { display: none; } /* hide charts on very small screens */
}