/* === LexiNote — Base Stylesheet === */

/* --- CSS Custom Properties (Theme Variables) --- */
:root,
[data-theme="light"] {
  --color-bg: #fafafa;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #666;
  --color-border: #e0e0e0;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-success: #16a34a;
  --color-success-bg: #dcfce7;
  --color-danger: #dc2626;
  --color-danger-hover: #b91c1c;
  --color-warning: #f59e0b;
  --color-mastered: #cbd5e1;
  --color-row-hover: #f1f5f9;
  --color-input-bg: #fff;
  --color-input-border: #d1d5db;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] {
  --color-bg: #111827;
  --color-surface: #1f2937;
  --color-text: #e5e7eb;
  --color-text-secondary: #9ca3af;
  --color-border: #374151;
  --color-accent: #60a5fa;
  --color-accent-hover: #93bbfd;
  --color-success: #4ade80;
  --color-success-bg: #14532d;
  --color-danger: #f87171;
  --color-danger-hover: #fca5a5;
  --color-warning: #fbbf24;
  --color-mastered: #374151;
  --color-row-hover: #1f2937;
  --color-input-bg: #374151;
  --color-input-border: #4b5563;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
}

/* --- Auto mode: follow system preference --- */
@media (prefers-color-scheme: dark) {
  [data-theme="auto"] {
    --color-bg: #111827;
    --color-surface: #1f2937;
    --color-text: #e5e7eb;
    --color-text-secondary: #9ca3af;
    --color-border: #374151;
    --color-accent: #60a5fa;
    --color-accent-hover: #93bbfd;
    --color-success: #4ade80;
    --color-success-bg: #14532d;
    --color-danger: #f87171;
    --color-danger-hover: #fca5a5;
    --color-warning: #fbbf24;
    --color-mastered: #374151;
    --color-row-hover: #1f2937;
    --color-input-bg: #374151;
    --color-input-border: #4b5563;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  }
}

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

/* Smooth theme transitions (skip motion if user prefers reduced) */
@media (prefers-reduced-motion: no-preference) {
  *, *::before, *::after {
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.15s ease;
  }
}

html {
  font-size: clamp(14px, 1vw + 8px, 18px);
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

*,
*::before,
*::after {
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-image:
    radial-gradient(ellipse at 50% 0%, var(--color-surface) 0%, transparent 60%);
  background-attachment: fixed;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* --- Global Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}

/* --- Layout --- */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 40px);
}

/* --- Navigation --- */
.nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 0 clamp(20px, 4vw, 40px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: clamp(48px, 7vh, 60px);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--color-surface) 85%, transparent);
}

.nav-brand {
  font-size: clamp(1.05rem, 2.5vw, 1.3rem);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: -0.3px;
}

.nav-links {
  display: flex;
  gap: clamp(8px, 2vw, 24px);
  align-items: center;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: clamp(0.8rem, 2vw, 0.95rem);
  padding: 4px 8px;
  border-radius: 4px;
  transition: color 0.15s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-accent);
  text-decoration: none;
}

.nav-links a.active {
  font-weight: 600;
}

/* --- Theme Toggle --- */
.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  padding: 4px 8px;
  color: var(--color-text);
  line-height: 1;
}

.theme-toggle:hover {
  background: var(--color-row-hover);
}

/* --- Page Content --- */
.page {
  padding: clamp(20px, 4vh, 40px) 0 clamp(40px, 8vh, 80px) 0;
}

/* --- Cards --- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: clamp(20px, 3vw, 32px);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.03);
}

[data-theme="dark"] .card {
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

@media (prefers-color-scheme: dark) {
  [data-theme="auto"] .card {
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
  }
}

/* --- Forms --- */
.form-group {
  margin-bottom: clamp(12px, 2vh, 20px);
}

.form-label {
  display: block;
  font-size: clamp(0.8rem, 2vw, 0.9rem);
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--color-text-secondary);
}

.form-input {
  width: 100%;
  padding: clamp(6px, 1.5vh, 10px) clamp(8px, 2vw, 14px);
  font-size: clamp(0.85rem, 2vw, 1rem);
  background: var(--color-input-bg);
  border: 1px solid var(--color-input-border);
  border-radius: 6px;
  color: var(--color-text);
  font-family: inherit;
}

.form-input:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: -1px;
}

.form-textarea {
  resize: none;
  min-height: 60px;
  overflow: hidden;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: clamp(6px, 1.5vh, 10px) clamp(12px, 3vw, 24px);
  font-size: clamp(0.85rem, 2vw, 0.95rem);
  font-weight: 600;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, opacity 0.15s;
}

.btn:hover {
  opacity: 0.9;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover { background: var(--color-accent-hover); }

.btn-success {
  background: var(--color-success);
  color: #fff;
}

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

.btn-danger:hover { background: var(--color-danger-hover); }

.btn-sm {
  padding: clamp(3px, 1vh, 6px) clamp(8px, 2vw, 14px);
  font-size: clamp(0.75rem, 1.8vw, 0.85rem);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

.btn-ghost:hover {
  background: var(--color-row-hover);
}

/* --- Tables --- */
.table-container {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: clamp(0.8rem, 2vw, 0.95rem);
}

th, td {
  padding: clamp(6px, 1.5vh, 12px) clamp(8px, 2vw, 16px);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  font-weight: 600;
  color: var(--color-text-secondary);
  font-size: clamp(0.75rem, 1.8vw, 0.85rem);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

tr:hover td {
  background: var(--color-row-hover);
}

/* --- 4-Column Learn Table --- */
.learn-table th:nth-child(1),
.learn-table td:nth-child(1) { width: 22%; }
.learn-table th:nth-child(2),
.learn-table td:nth-child(2) { width: 13%; }
.learn-table th:nth-child(3),
.learn-table td:nth-child(3) { width: 55%; }
.learn-table th:nth-child(4),
.learn-table td:nth-child(4) { width: 10%; text-align: center; }

/* Mastery toggle button */
.mastery-btn {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 1.25rem;
  padding: 4px 8px;
  line-height: 1;
  transition: all 0.15s;
}
.mastery-btn:hover {
  border-color: var(--color-success);
  background: var(--color-success-light, rgba(46, 160, 67, 0.08));
  transform: scale(1.1);
}

/* Mastered row styling */
.word-mastered td {
  opacity: 0.55;
}

.learn-word {
  font-weight: 700;
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--color-accent);
}

.learn-phonetic {
  font-size: clamp(0.7rem, 1.6vw, 0.8rem);
  color: var(--color-text-secondary);
  margin-top: 2px;
}

/* --- Alerts --- */
.alert {
  padding: clamp(8px, 2vh, 14px) clamp(12px, 3vw, 20px);
  border-radius: 6px;
  margin-bottom: clamp(12px, 2vh, 20px);
  font-size: clamp(0.8rem, 2vw, 0.9rem);
}

.alert-error {
  background: #fee2e2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.alert-success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.alert-info {
  background: #dbeafe;
  color: #1e40af;
  border: 1px solid #93c5fd;
}

[data-theme="dark"] .alert-error { background: #450a0a; color: #fca5a5; border-color: #7f1d1d; }
[data-theme="dark"] .alert-info { background: #172554; color: #93c5fd; border-color: #1e3a5f; }

@media (prefers-color-scheme: dark) {
  [data-theme="auto"] .alert-error { background: #450a0a; color: #fca5a5; border-color: #7f1d1d; }
  [data-theme="auto"] .alert-info { background: #172554; color: #93c5fd; border-color: #1e3a5f; }
}

/* --- Login Page --- */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-card {
  width: 100%;
  max-width: 400px;
  padding: clamp(28px, 5vw, 44px);
  border-radius: 16px;
}

.login-card h1 {
  text-align: center;
  font-size: clamp(1.4rem, 3.5vw, 1.8rem);
  margin-bottom: clamp(20px, 3vh, 32px);
  color: var(--color-accent);
  font-weight: 800;
  letter-spacing: -0.5px;
}

/* --- Date Picker --- */
.date-picker {
  display: flex;
  align-items: center;
  gap: clamp(8px, 2vw, 16px);
  margin-bottom: clamp(16px, 3vh, 24px);
  flex-wrap: wrap;
}

.date-picker select {
  padding: clamp(4px, 1vh, 8px) clamp(8px, 2vw, 14px);
  font-size: clamp(0.85rem, 2vw, 0.95rem);
  background: var(--color-input-bg);
  border: 1px solid var(--color-input-border);
  border-radius: 6px;
  color: var(--color-text);
  font-family: inherit;
  cursor: pointer;
}

/* --- Stats Bar --- */
.stats-bar {
  display: flex;
  gap: clamp(12px, 3vw, 32px);
  margin-bottom: clamp(16px, 3vh, 24px);
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  font-weight: 700;
  color: var(--color-accent);
}

.stat-label {
  font-size: clamp(0.7rem, 1.6vw, 0.8rem);
  color: var(--color-text-secondary);
}

/* --- Filter Tabs --- */
.filter-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: clamp(12px, 2vh, 20px);
}

.filter-tab {
  padding: clamp(4px, 1vh, 8px) clamp(10px, 2.5vw, 20px);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  border-radius: 6px;
  font-size: clamp(0.8rem, 2vw, 0.9rem);
  cursor: pointer;
  font-family: inherit;
}

.filter-tab.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

/* --- Mastery Toggle Button --- */
.mastery-btn {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  cursor: pointer;
  padding: 2px 8px;
  font-size: clamp(0.9rem, 2.2vw, 1.1rem);
}

.mastery-btn:hover {
  background: var(--color-row-hover);
}

.word-mastered td {
  color: var(--color-text-secondary);
  opacity: 0.7;
}

/* --- Test Pages --- */
.test-word {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 700;
  text-align: center;
  margin: clamp(20px, 5vh, 40px) 0;
  color: var(--color-accent);
}

.test-options {
  display: flex;
  flex-direction: column;
  gap: clamp(6px, 1.5vh, 10px);
  max-width: 500px;
  margin: 0 auto;
}

.test-option-btn {
  display: block;
  width: 100%;
  padding: clamp(8px, 2vh, 14px) clamp(12px, 3vw, 20px);
  text-align: left;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: clamp(0.85rem, 2vw, 1rem);
  color: var(--color-text);
  cursor: pointer;
  font-family: inherit;
  transition: border-color 0.15s;
}

.test-option-btn:hover {
  border-color: var(--color-accent);
}

.test-speak-btn {
  display: block;
  margin: 0 auto clamp(12px, 3vh, 24px);
  font-size: clamp(1.8rem, 5vw, 2.5rem);
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  width: clamp(56px, 10vw, 72px);
  height: clamp(56px, 10vw, 72px);
  cursor: pointer;
  color: var(--color-accent);
}

.test-speak-btn:hover {
  background: var(--color-row-hover);
}

.test-progress {
  text-align: center;
  color: var(--color-text-secondary);
  font-size: clamp(0.75rem, 1.8vw, 0.85rem);
  margin-bottom: clamp(12px, 2vh, 20px);
}

.test-result {
  text-align: center;
  padding: clamp(8px, 2vh, 14px);
  margin-bottom: clamp(8px, 2vh, 16px);
  border-radius: 6px;
  font-size: clamp(0.8rem, 2vw, 0.9rem);
  font-weight: 600;
}

.test-result.correct { background: var(--color-success-bg); color: var(--color-success); }
.test-result.wrong { background: #fee2e2; color: var(--color-danger); }

[data-theme="dark"] .test-result.wrong { background: #450a0a; }

@media (prefers-color-scheme: dark) {
  [data-theme="auto"] .test-result.wrong { background: #450a0a; }
}

/* --- Inline Actions --- */
.inline-actions {
  display: flex;
  gap: 6px;
  align-items: center;
}

/* --- Action Icon Buttons --- */
.action-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  font-size: 0.85rem;
  text-decoration: none;
  transition: background 0.15s;
  line-height: 1;
}

.action-icon-btn:hover {
  background: var(--color-row-hover);
  text-decoration: none;
}

.action-icon-delete {
  color: var(--color-danger);
  font-family: inherit;
}

/* --- Date Group Section --- */
.date-group {
  margin-bottom: clamp(20px, 4vh, 32px);
}

.date-group-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  padding: 0 2px;
}

.date-group-icon {
  font-size: 0.85rem;
}

.date-group-label {
  font-weight: 700;
  font-size: clamp(0.85rem, 2vw, 1rem);
  color: var(--color-text);
}

.date-group-count {
  font-size: clamp(0.7rem, 1.6vw, 0.78rem);
  color: var(--color-text-secondary);
  background: var(--color-row-hover);
  padding: 2px 8px;
  border-radius: 10px;
}

/* --- POS cell — more breathing room --- */
.pos-cell {
  font-weight: 600;
  color: var(--color-text-secondary);
  letter-spacing: 0.03em;
  white-space: nowrap;
}

/* --- Responsive: Mobile --- */
@media (max-width: 768px) {
  .container {
    padding: 0 clamp(14px, 3vw, 20px);
  }

  .nav {
    padding: 0 clamp(14px, 3vw, 20px);
  }

  .nav-links {
    gap: 2px;
  }

  .nav-links a {
    padding: 4px 6px;
    font-size: 0.75rem;
  }

  /* Learn table: hide POS column on small screens */
  .learn-table th:nth-child(2),
  .learn-table td:nth-child(2) {
    display: none;
  }

  .learn-table th:nth-child(1),
  .learn-table td:nth-child(1) { width: 38%; }
  .learn-table th:nth-child(3),
  .learn-table td:nth-child(3) { width: 48%; }
  .learn-table th:nth-child(4),
  .learn-table td:nth-child(4) { width: 14%; }

  .mastery-btn {
    font-size: 1rem;
    padding: 3px 6px;
  }

  .filter-tabs {
    flex-wrap: wrap;
  }

  .stats-bar {
    gap: 16px;
  }
}

/* --- Utility --- */
.mt-1 { margin-top: clamp(8px, 1.5vh, 16px); }
.mb-1 { margin-bottom: clamp(8px, 1.5vh, 16px); }
.text-center { text-align: center; }
.text-secondary { color: var(--color-text-secondary); }
.text-sm { font-size: clamp(0.75rem, 1.8vw, 0.85rem); }
.font-bold { font-weight: 700; }
.muted { opacity: 0.6; }

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: clamp(32px, 8vh, 64px) 0;
  color: var(--color-text-secondary);
}

.empty-state .icon {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: 12px;
}

/* --- Phonetic & extra info display in learn table --- */
.extra-row {
  font-size: clamp(0.7rem, 1.6vw, 0.8rem);
  color: var(--color-text-secondary);
  padding-top: 2px;
}

/* --- Profile Page --- */
.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(12px, 2vh, 20px);
}

@media (max-width: 768px) {
  .profile-grid {
    grid-template-columns: 1fr;
  }
}

.profile-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  text-align: center;
}

.profile-stat-num {
  font-size: clamp(1.3rem, 3vw, 1.6rem);
  font-weight: 700;
  color: var(--color-accent);
}

.profile-stat-label {
  font-size: clamp(0.7rem, 1.6vw, 0.8rem);
  color: var(--color-text-secondary);
  margin-top: 2px;
}

/* --- Daily Chart --- */
.daily-chart {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 120px;
  padding-top: 4px;
}

.daily-bar-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  justify-content: flex-end;
}

.daily-bar {
  width: 100%;
  max-width: 20px;
  background: var(--color-accent);
  border-radius: 3px 3px 0 0;
  min-height: 2px;
  transition: opacity 0.15s;
  opacity: 0.75;
}

.daily-bar:hover {
  opacity: 1;
}

.daily-date {
  font-size: 0.55rem;
  color: var(--color-text-secondary);
  margin-top: 4px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

/* --- Mastered Tag --- */
.mastered-tag {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  background: var(--color-success-bg);
  color: var(--color-success);
  border-radius: 16px;
  font-size: 0.85rem;
  font-weight: 500;
}

/* ═══════════════════════════════════════════════════════════════
   PROFILE PAGE — Dashboard, Charts, Heatmap
   ═══════════════════════════════════════════════════════════════ */

/* --- Profile Header --- */
.profile-header {
  margin-bottom: clamp(14px, 2vh, 24px);
}
.profile-title {
  margin: 0;
  font-size: 1.4rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}
.profile-title::before {
  content: "👤";
  font-size: 1.2rem;
}
.profile-subtitle {
  display: block;
  margin-top: 2px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

/* --- Dashboard Card --- */
.profile-dashboard {
  padding: clamp(16px, 2vw, 24px);
  margin-bottom: clamp(14px, 2vh, 20px);
}

/* --- Chart Section --- */
.chart-section {
  margin-bottom: 20px;
}
.chart-title {
  margin: 0 0 12px 0;
  font-size: 1rem;
  font-weight: 600;
}
.chart-container {
  width: 100%;
  overflow-x: auto;
}
.trend-chart {
  width: 100%;
  height: auto;
  min-width: 340px;
}
.chart-label {
  fill: var(--color-text-secondary);
  font-size: 10px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
.chart-legend {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}
.legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  vertical-align: middle;
  margin-right: 4px;
}

/* --- Stat Cards --- */
.stat-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.stat-card {
  text-align: center;
  padding: clamp(10px, 1.5vw, 16px) 8px;
  border-radius: 10px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: transform 0.15s;
}
.stat-card:hover {
  transform: translateY(-2px);
}
.stat-card-icon {
  font-size: 1.3rem;
  margin-bottom: 4px;
}
.stat-card-num {
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
}
.stat-card-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  margin-top: 2px;
}
.stat-added .stat-card-num { color: var(--color-accent); }
.stat-mastered .stat-card-num { color: var(--color-success); }
.stat-mastered-total .stat-card-num { color: var(--color-warning); }

@media (max-width: 500px) {
  .stat-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- Heatmap Card --- */
.profile-heatmap-card {
  padding: clamp(16px, 2vw, 24px);
  margin-bottom: clamp(14px, 2vh, 20px);
  overflow-x: auto;
}
.heatmap-wrapper {
  display: flex;
  justify-content: center;
  min-width: 680px;
  padding: 8px 0;
}
.heatmap-grid {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.heatmap-months {
  display: grid;
  grid-template-columns: 28px repeat(53, 1fr);
  font-size: 10px;
  color: var(--color-text-secondary);
  margin-bottom: 2px;
  padding-left: 0;
}
.heatmap-months span {
  font-size: 10px;
}
.heatmap-cells {
  display: grid;
  grid-template-columns: 28px repeat(53, 1fr);
  grid-template-rows: repeat(7, 13px);
  gap: 2px;
}
.heatmap-day-label {
  font-size: 9px;
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 4px;
}
.heatmap-cell {
  width: 13px;
  height: 13px;
  border-radius: 2px;
  outline: 1px solid rgba(128, 128, 128, 0.15);
  outline-offset: -1px;
}
.hl-0 { background: var(--color-border); }
.hl-1 { background: #9be9a8; }
.hl-2 { background: #40c463; }
.hl-3 { background: #30a14e; }
.hl-4 { background: #216e39; }
[data-theme="dark"] .hl-0,
@media (prefers-color-scheme: dark) { [data-theme="auto"] .hl-0 { background: #2d333b; } }
[data-theme="dark"] .hl-1,
@media (prefers-color-scheme: dark) { [data-theme="auto"] .hl-1 { background: #0e4429; } }
[data-theme="dark"] .hl-2,
@media (prefers-color-scheme: dark) { [data-theme="auto"] .hl-2 { background: #006d32; } }
[data-theme="dark"] .hl-3,
@media (prefers-color-scheme: dark) { [data-theme="auto"] .hl-3 { background: #26a641; } }
[data-theme="dark"] .hl-4,
@media (prefers-color-scheme: dark) { [data-theme="auto"] .hl-4 { background: #39d353; } }

.heatmap-legend {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 3px;
  margin-top: 8px;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}
.heatmap-legend .heatmap-cell {
  width: 11px;
  height: 11px;
}

/* --- Voice Card --- */
.profile-voice-card {
  padding: clamp(16px, 2vw, 24px);
  margin-bottom: clamp(14px, 2vh, 20px);
}
.voice-row {
  display: flex;
  gap: 10px;
  align-items: center;
}
.voice-select {
  flex: 1;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  background: var(--color-input-bg);
  color: var(--color-text);
  font-size: 0.9rem;
  appearance: auto;
}

/* --- Logout Card --- */
.profile-logout-card {
  padding: clamp(16px, 2vw, 24px);
}