/* ─── CSS Variables — Dark Mode (default) ───────────────────────────────────── */
:root {
  --bg:        #0b0b10;
  --surface:   #14141c;
  --surface2:  #1e1e2a;
  --border:    #2a2a3c;
  --accent:    #6c63ff;
  --accent2:   #ff6584;
  --up:        #00e5a0;
  --down:      #ff5c87;
  --text:      #f0f0f8;
  --text2:     #8888aa;
  --text3:     #55556a;
  --radius:    14px;
  --radius-sm: 9px;
  --mono:      'DM Mono', monospace;
  --sans:      'Syne', sans-serif;
  --shadow:    0 4px 32px rgba(0,0,0,0.4);
}

/* ─── Light Mode ─────────────────────────────────────────────────────────────── */
[data-theme="light"] {
  --bg:       #f4f4fb;
  --surface:  #ffffff;
  --surface2: #f0f0f8;
  --border:   #e0e0f0;
  --text:     #0b0b10;
  --text2:    #555577;
  --text3:    #9999bb;
  --shadow:   0 4px 24px rgba(0,0,0,0.08);
}

/* ─── Reset ──────────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 0.3s, color 0.3s;
}

/* ─── App Shell ──────────────────────────────────────────────────────────────── */
.app { max-width: 1200px; margin: 0 auto; padding: 28px 20px 60px; }

/* ─── Header ─────────────────────────────────────────────────────────────────── */
.header {
  display: flex; align-items: center;
  justify-content: space-between;
  flex-wrap: wrap; gap: 16px;
  margin-bottom: 32px;
}
.logo { display: flex; align-items: center; gap: 12px; }
.logo-icon {
  width: 42px; height: 42px; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 800; color: #fff;
  box-shadow: 0 4px 20px rgba(108,99,255,0.4);
}
.logo-text { font-size: 21px; font-weight: 800; letter-spacing: -0.5px; }
.logo-text span { color: var(--accent); }

.header-right { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

/* Search */
.search-wrap { position: relative; }
.search-input {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 16px 10px 38px;
  color: var(--text); font-family: var(--mono); font-size: 13px;
  outline: none; width: 220px;
  transition: border-color 0.2s, width 0.2s;
}
.search-input:focus { border-color: var(--accent); width: 260px; }
.search-input::placeholder { color: var(--text3); }
.search-icon {
  position: absolute; left: 12px; top: 50%;
  transform: translateY(-50%); font-size: 15px;
  pointer-events: none;
}

/* Buttons */
.btn {
  padding: 10px 18px; border-radius: var(--radius-sm); border: none;
  font-family: var(--sans); font-size: 13px; font-weight: 700;
  cursor: pointer; display: flex; align-items: center; gap: 7px;
  transition: all 0.15s;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #8b82ff);
  color: #fff; box-shadow: 0 4px 16px rgba(108,99,255,0.3);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 6px 24px rgba(108,99,255,0.5); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-ghost {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text2);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-ghost.active { background: var(--surface2); border-color: var(--accent); color: var(--accent); }

/* Theme toggle */
.theme-toggle {
  width: 38px; height: 38px; border-radius: var(--radius-sm);
  background: var(--surface); border: 1px solid var(--border);
  cursor: pointer; display: flex; align-items: center;
  justify-content: center; font-size: 17px;
  transition: all 0.15s;
}
.theme-toggle:hover { border-color: var(--accent); }

/* ─── Stats Bar ──────────────────────────────────────────────────────────────── */
.stats-bar {
  display: flex; gap: 12px; margin-bottom: 24px; flex-wrap: wrap;
}
.stat-chip {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 30px; padding: 7px 16px;
  font-size: 12px; font-family: var(--mono);
  color: var(--text2); display: flex; align-items: center; gap: 8px;
}
.stat-chip strong { color: var(--text); }

/* ─── Tabs ───────────────────────────────────────────────────────────────────── */
.tabs { display: flex; gap: 6px; margin-bottom: 20px; }
.tab {
  padding: 8px 18px; border-radius: var(--radius-sm);
  border: none; background: transparent;
  font-family: var(--sans); font-size: 13px; font-weight: 700;
  color: var(--text3); cursor: pointer; transition: all 0.15s;
}
.tab.active { background: var(--surface2); color: var(--text); }
.tab:hover:not(.active) { color: var(--text2); }

/* ─── Table Header ───────────────────────────────────────────────────────────── */
.table-header {
  display: grid;
  grid-template-columns: 40px 2fr 1.5fr 1.2fr 1.2fr 80px;
  padding: 10px 16px;
  font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 1px;
  color: var(--text3); border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
}
@media (max-width: 640px) {
  .table-header { grid-template-columns: 40px 2fr 1fr 80px; }
  .table-header .hide-mobile { display: none; }
}

/* ─── Coin Card ──────────────────────────────────────────────────────────────── */
.coin-card {
  display: grid;
  grid-template-columns: 40px 2fr 1.5fr 1.2fr 1.2fr 80px;
  align-items: center;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
  animation: fadeIn 0.3s ease;
}
.coin-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(108,99,255,0.12);
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
@media (max-width: 640px) {
  .coin-card { grid-template-columns: 40px 2fr 1fr 80px; }
  .coin-card .hide-mobile { display: none; }
}

.rank {
  font-size: 12px; font-family: var(--mono);
  color: var(--text3); text-align: center;
}

.coin-info { display: flex; align-items: center; gap: 12px; }
.coin-img { width: 36px; height: 36px; border-radius: 50%; }
.coin-img-placeholder {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--surface2); display: flex;
  align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800; color: var(--accent);
}
.coin-name { font-size: 14px; font-weight: 700; }
.coin-symbol {
  font-size: 11px; color: var(--text3);
  font-family: var(--mono); text-transform: uppercase; margin-top: 2px;
}

.coin-price {
  font-family: var(--mono); font-size: 14px; font-weight: 500;
}

.change {
  font-family: var(--mono); font-size: 13px; font-weight: 500;
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 10px; border-radius: 20px;
}
.change.up   { color: var(--up);   background: rgba(0,229,160,0.1); }
.change.down { color: var(--down); background: rgba(255,92,135,0.1); }

.market-cap {
  font-family: var(--mono); font-size: 12px; color: var(--text2);
}

/* Star / Watchlist button */
.star-btn {
  background: none; border: none; cursor: pointer;
  font-size: 20px; padding: 4px; border-radius: 6px;
  transition: transform 0.15s; display: flex;
  align-items: center; justify-content: center;
}
.star-btn:hover { transform: scale(1.2); }

/* ─── Skeleton Loader ────────────────────────────────────────────────────────── */
.skeleton {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
  padding: 14px 16px;
  display: flex; align-items: center; gap: 16px;
  overflow: hidden; position: relative;
}
.skeleton::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.04), transparent);
  animation: shimmer 1.5s infinite;
}
@keyframes shimmer { from { transform: translateX(-100%); } to { transform: translateX(100%); } }
.skel-circle { width: 36px; height: 36px; border-radius: 50%; background: var(--surface2); flex-shrink: 0; }
.skel-lines { flex: 1; display: flex; flex-direction: column; gap: 8px; }
.skel-line { height: 12px; border-radius: 6px; background: var(--surface2); }

/* ─── Error Banner ───────────────────────────────────────────────────────────── */
.error-banner {
  background: rgba(255,92,135,0.1);
  border: 1px solid rgba(255,92,135,0.3);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 20px;
  display: flex; align-items: center;
  justify-content: space-between; gap: 16px;
  flex-wrap: wrap;
}
.error-text { font-size: 14px; color: var(--down); display: flex; align-items: center; gap: 10px; }
.btn-retry {
  padding: 8px 16px; border-radius: var(--radius-sm);
  background: rgba(255,92,135,0.15); border: 1px solid rgba(255,92,135,0.3);
  color: var(--down); font-family: var(--sans); font-size: 13px; font-weight: 700;
  cursor: pointer; transition: all 0.15s;
}
.btn-retry:hover { background: rgba(255,92,135,0.25); }

/* ─── Empty State ────────────────────────────────────────────────────────────── */
.empty-state {
  text-align: center; padding: 60px 20px; color: var(--text3);
}
.empty-icon  { font-size: 48px; margin-bottom: 16px; opacity: 0.5; }
.empty-title { font-size: 16px; font-weight: 700; color: var(--text2); margin-bottom: 8px; }
.empty-sub   { font-size: 13px; line-height: 1.6; }

/* ─── Modal ──────────────────────────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(6px);
  z-index: 100;
  display: flex; align-items: center; justify-content: center;
  padding: 20px;
  animation: fadeIn 0.15s ease;
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px; padding: 32px;
  width: 100%; max-width: 480px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
  animation: slideUp 0.2s ease;
}
@keyframes slideUp { from { transform: translateY(16px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

.modal-header {
  display: flex; align-items: center;
  justify-content: space-between; margin-bottom: 24px;
}
.modal-coin-info { display: flex; align-items: center; gap: 14px; }
.modal-coin-img  { width: 48px; height: 48px; border-radius: 50%; }
.modal-coin-name { font-size: 20px; font-weight: 800; }
.modal-coin-sym  { font-size: 13px; color: var(--text3); font-family: var(--mono); text-transform: uppercase; }
.modal-close {
  width: 34px; height: 34px; border-radius: 8px;
  background: var(--surface2); border: 1px solid var(--border);
  color: var(--text2); cursor: pointer; font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
}
.modal-close:hover { border-color: var(--down); color: var(--down); }

.modal-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 12px; margin-bottom: 20px;
}
.modal-stat {
  background: var(--surface2); border-radius: var(--radius-sm);
  padding: 14px 16px;
}
.modal-stat-label { font-size: 11px; color: var(--text3); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 6px; }
.modal-stat-value { font-family: var(--mono); font-size: 15px; font-weight: 500; }

.modal-footer { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* ─── Last Updated ───────────────────────────────────────────────────────────── */
.last-updated {
  text-align: center; font-size: 12px;
  color: var(--text3); font-family: var(--mono);
  margin-top: 24px;
}

/* ─── Spin animation for refresh ────────────────────────────────────────────── */
.spin { animation: spin 1s linear infinite; display: inline-block; }
@keyframes spin { to { transform: rotate(360deg); } }