/* ═══════════════════════════════════════════
   UNIVERSAL UNIT CONVERTER COMPONENT STYLING
   ═══════════════════════════════════════════ */

.conv-wrapper {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Category Tabs */
.conv-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}

.conv-tab-btn {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  padding: 12px 16px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.conv-tab-btn:hover {
  color: var(--text-primary);
}

.conv-tab-btn.active {
  color: var(--accent-blue);
  border-bottom-color: var(--accent-blue);
}

/* Panel Body */
.conv-body {
  background: rgba(255, 255, 255, 0.015);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 24px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
}

.conv-panel {
  display: none;
}

.conv-panel.active {
  display: block;
  animation: fadeIn 0.25s ease forwards;
}

/* Grid Layout */
.conv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.conv-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.conv-label {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.conv-input {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 12px 14px;
  font-size: 15px;
  font-family: 'JetBrains Mono', monospace;
  width: 100%;
  box-sizing: border-box;
  transition: all 0.2s ease;
}

.conv-input:focus {
  border-color: var(--accent-blue);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: var(--glow-blue);
  outline: none;
}

.conv-tip {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 16px;
}

/* Timezone Specifics */
.tz-header {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
  margin-bottom: 24px;
  background: rgba(255, 255, 255, 0.015);
  padding: 18px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.tz-input-wrap {
  flex: 1;
  min-width: 200px;
}

.tz-base-input {
  margin-top: 8px;
}

.tz-now-btn {
  height: 46px;
  padding: 0 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 13px;
  border: 1px solid rgba(94, 106, 210, 0.3);
  background: rgba(94, 106, 210, 0.1);
  color: #c7d2fe;
  cursor: pointer;
  transition: all 0.2s ease;
}
.tz-now-btn:hover {
  background: rgba(94, 106, 210, 0.2);
  border-color: rgba(94, 106, 210, 0.5);
  box-shadow: 0 0 12px rgba(94, 106, 210, 0.2);
}

.tz-results-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tz-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 16px 20px;
  gap: 16px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.tz-card:hover {
  transform: translateX(4px);
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--accent-blue);
  box-shadow: 0 4px 12px rgba(96, 165, 250, 0.08);
}

.tz-card-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.tz-card-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
}

.tz-card-desc {
  font-size: 12px;
  color: var(--text-muted);
}

.tz-card-time-wrap {
  text-align: right;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.tz-card-time {
  font-size: 22px;
  font-weight: 800;
  color: var(--accent-blue);
  font-family: 'JetBrains Mono', monospace;
  text-shadow: 0 0 10px rgba(96, 165, 250, 0.3);
}

.tz-card-date-lbl {
  font-size: 11px;
}

.tz-date-same {
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 10px;
}

.tz-date-ahead {
  color: var(--accent-green);
  background: rgba(52, 211, 153, 0.08);
  border: 1px solid rgba(52, 211, 153, 0.15);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 10px;
}

.tz-date-behind {
  color: var(--accent-red);
  background: rgba(248, 113, 113, 0.08);
  border: 1px solid rgba(248, 113, 113, 0.15);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 10px;
}

/* Responsiveness */
@media (max-width: 576px) {
  .tz-card {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .tz-card-time-wrap {
    text-align: left;
    align-items: flex-start;
  }
  .tz-card-time {
    font-size: 18px;
  }
}

/* Quick Reference Table */
.conv-ref-container {
  margin-top: 28px;
  border-top: 1px dashed var(--border);
  padding-top: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.conv-ref-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.conv-ref-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-blue);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.conv-ref-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}

.conv-ref-table th {
  padding: 8px 6px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.conv-ref-table td {
  padding: 8px 6px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.02);
  color: var(--text-secondary);
  font-family: 'JetBrains Mono', monospace;
}

.conv-ref-table tr:last-child td {
  border-bottom: none;
}

.conv-ref-table tr:hover td {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.02);
}

/* BMI Calculator Specifics */
.bmi-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.bmi-card {
  background: rgba(255, 255, 255, 0.015);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.bmi-gender-toggle {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.bmi-gender-btn {
  flex: 1;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  transition: all 0.2s ease;
}

.bmi-gender-btn:hover {
  background: rgba(255,255,255,0.05);
  color: var(--text-primary);
}

.bmi-gender-btn.active[data-gender="male"] {
  background: rgba(59, 130, 246, 0.15);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.bmi-gender-btn.active[data-gender="female"] {
  background: rgba(236, 72, 153, 0.15);
  border-color: #ec4899;
  color: #ec4899;
}

.bmi-results-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 100%;
  gap: 16px;
  padding: 10px 0;
}

.bmi-circle-container {
  position: relative;
  width: 140px;
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bmi-circle {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  border: 6px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.25);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.3);
}

.bmi-circle-val {
  font-size: 32px;
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
}

.bmi-circle-lbl {
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
}

.bmi-status-text {
  font-size: 18px;
  font-weight: 700;
  transition: color 0.3s ease;
}

.bmi-ideal-text {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* BMI Brackets Bar */
.bmi-scale-bar {
  width: 100%;
  height: 10px;
  border-radius: 5px;
  background: linear-gradient(to right, 
    #60a5fa 0% 25%,   /* Gầy: < 18.5 */
    #34d399 25% 55%,  /* Bình thường: 18.5 - 22.9 */
    #fbbf24 55% 70%,  /* Tiền béo phì: 23.0 - 24.9 */
    #f97316 70% 85%,  /* Béo phì độ 1: 25.0 - 29.9 */
    #ef4444 85% 100%  /* Béo phì độ 2: >= 30 */
  );
  position: relative;
  margin-top: 10px;
}

.bmi-scale-indicator {
  position: absolute;
  top: -6px;
  width: 6px;
  height: 22px;
  background: #fff;
  border: 1px solid #000;
  border-radius: 3px;
  box-shadow: 0 0 4px rgba(0,0,0,0.5);
  transform: translateX(-50%);
  transition: left 0.3s ease;
}

.bmi-bracket-labels {
  display: flex;
  justify-content: space-between;
  width: 100%;
  font-size: 10px;
  color: var(--text-muted);
  padding: 0 2px;
}

/* ── Light Mode Overrides ── */
:root[data-theme="light"] .conv-body {
  background: var(--bg-secondary);
  border-color: var(--border);
}
:root[data-theme="light"] .conv-input {
  background: var(--bg-card);
}
:root[data-theme="light"] .conv-input:focus {
  background: var(--bg-card-hover);
}
:root[data-theme="light"] .tz-header {
  background: var(--bg-secondary);
  border-color: var(--border);
}
:root[data-theme="light"] .tz-now-btn {
  color: var(--accent-blue);
  background: rgba(94, 106, 210, 0.06);
}
:root[data-theme="light"] .tz-now-btn:hover {
  background: rgba(94, 106, 210, 0.12);
}
:root[data-theme="light"] .tz-card {
  background: var(--bg-secondary);
  border-color: var(--border);
}
:root[data-theme="light"] .tz-card:hover {
  background: var(--bg-card-hover);
}
:root[data-theme="light"] .tz-date-same {
  background: rgba(0, 0, 0, 0.04);
}
:root[data-theme="light"] .conv-ref-table tr:hover td {
  background: rgba(0, 0, 0, 0.02);
}
:root[data-theme="light"] .conv-ref-table td {
  border-bottom-color: var(--border);
}
:root[data-theme="light"] .bmi-card {
  background: var(--bg-secondary);
  border-color: var(--border);
}
:root[data-theme="light"] .bmi-gender-btn {
  background: var(--bg-card);
}
:root[data-theme="light"] .bmi-gender-btn:hover {
  background: var(--bg-card-hover);
}
:root[data-theme="light"] .bmi-circle {
  background: rgba(0, 0, 0, 0.03);
  border-color: rgba(0, 0, 0, 0.05);
}