:root {
  --bg: #0b0f19;
  --surface: #121826;
  --surface-inner: #182234;
  --border: #222f46;
  --text-main: #ffffff;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --big-color: #f59e0b;
  --small-color: #38bdf8;
  --font-sans: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  padding-bottom: 50px;
  overflow-x: hidden;
}

/* Header */
.top-header {
  background: #111827;
  border-bottom: 1px solid var(--border);
  padding: 14px 20px;
}
.header-inner {
  max-width: 900px;
  margin: 0 auto;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-dot {
  width: 10px;
  height: 10px;
  background: #10b981;
  border-radius: 50%;
  box-shadow: 0 0 10px #10b981;
}
.logo-title {
  font-weight: 800;
  letter-spacing: 1px;
  font-size: 1.05rem;
}

/* Container */
.main-wrapper {
  max-width: 900px;
  margin: 20px auto;
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.search-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

/* Form */
.search-form {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 12px;
  align-items: flex-end;
}
.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.input-group label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
}
.input-group input {
  background: var(--bg);
  border: 1px solid var(--border);
  color: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 700;
  outline: none;
  text-align: center;
}
.input-group input:focus {
  border-color: var(--accent);
}
.search-btn {
  background: var(--accent);
  color: #04121e;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 800;
  font-size: 0.95rem;
  cursor: pointer;
  height: 44px;
  transition: opacity 0.2s;
}
.search-btn:active {
  opacity: 0.8;
}

/* Loading Box */
.loading-box {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 25px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 0.9rem;
  color: var(--text-muted);
}
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Results Summary */
.summary-bar {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}
.summary-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.summary-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--text-muted);
}
.summary-val {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 800;
}
.total-box .summary-val { color: #fff; }
.big-box .summary-val { color: var(--big-color); }
.small-box .summary-val { color: var(--small-color); }

/* Pair Cards */
.pairs-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.pair-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pair-header {
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.matched-section, .after-section {
  background: var(--surface-inner);
  border-radius: 8px;
  padding: 10px 14px;
}
.section-tag {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.period-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  padding: 3px 0;
}
.period-num {
  color: var(--text-muted);
}
.result-digit {
  font-weight: 800;
  color: #fff;
  font-size: 1rem;
}
.after-section {
  border-left: 3px solid var(--accent);
}
.after-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.95rem;
}
.tag-size {
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 800;
  font-size: 0.75rem;
}
.tag-size.BIG { background: rgba(245, 158, 11, 0.15); color: var(--big-color); border: 1px solid rgba(245, 158, 11, 0.3); }
.tag-size.SMALL { background: rgba(56, 189, 248, 0.15); color: var(--small-color); border: 1px solid rgba(56, 189, 248, 0.3); }

/* Normal History Section */
.history-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.refresh-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
}
.refresh-btn:hover { color: #fff; border-color: var(--accent); }

.history-table-wrapper {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.history-table-header {
  background: var(--surface-inner);
  display: flex;
  padding: 10px 14px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
}
.history-rows {
  display: flex;
  flex-direction: column;
}
.history-row {
  display: flex;
  align-items: center;
  padding: 10px 14px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.88rem;
}
.col-left { flex: 2; text-align: left; }
.col-center { flex: 1; text-align: center; font-weight: 800; color: #fff; font-size: 1.05rem; }
.col-right { flex: 1; text-align: right; }

.hidden { display: none !important; }

/* Mobile Rules */
@media (max-width: 600px) {
  .search-form { grid-template-columns: 1fr; }
  .search-btn { width: 100%; }
  .main-wrapper { padding: 0 10px; }
  .card { padding: 14px; }
  .period-row, .after-row { font-size: 0.84rem; }
}