/* ===========================
   Personal Dashboard
   Apple-esque · Glassmorphism · 960 Grid
   Mobile-First Responsive
   =========================== */

/* ─── Theme Variables ─── */
:root[data-theme="light"] {
  --bg-primary: #f2f2f7;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.72);
  --bg-card-hover: rgba(255, 255, 255, 0.88);
  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --text-tertiary: #aeaeb2;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --accent-subtle: rgba(0, 113, 227, 0.08);
  --border: rgba(0, 0, 0, 0.08);
  --border-strong: rgba(0, 0, 0, 0.15);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.1);
  --blur: 20px;
  --success: #34c759;
  --error: #ff3b30;
  --warning: #ff9500;
  --glass-border: rgba(255, 255, 255, 0.7);
}

:root[data-theme="dark"] {
  --bg-primary: #000000;
  --bg-secondary: #1c1c1e;
  --bg-card: rgba(28, 28, 30, 0.72);
  --bg-card-hover: rgba(44, 44, 46, 0.82);
  --text-primary: #f5f5f7;
  --text-secondary: #98989d;
  --text-tertiary: #636366;
  --accent: #0a84ff;
  --accent-hover: #409cff;
  --accent-subtle: rgba(10, 132, 255, 0.12);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.15);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 24px 64px rgba(0, 0, 0, 0.5);
  --blur: 20px;
  --success: #30d158;
  --error: #ff453a;
  --warning: #ff9f0a;
  --glass-border: rgba(255, 255, 255, 0.1);
}

/* ─── Typography Scale (Golden Ratio 1.618) ─── */
:root {
  --font-xs: 0.694rem;
  --font-sm: 0.833rem;
  --font-base: 1rem;
  --font-md: 1.2rem;
  --font-lg: 1.44rem;
  --font-xl: 1.728rem;
  --font-2xl: 2.488rem;
  --font-3xl: 3.583rem;
  --font-4xl: 5rem;

  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-black: 900;

  --leading-tight: 1.05;
  --leading-snug: 1.2;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;

  --tracking-tight: -0.035em;
  --tracking-normal: 0;
  --tracking-wide: 0.015em;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
}

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

html {
  font-size: clamp(15px, 0.9vw + 12px, 18px);
  scroll-behavior: smooth;
}

body {
  font-family: 'Mona Sans', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
  font-size: var(--font-base);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
  color: var(--text-primary);
  background: var(--bg-primary);
  min-height: 100vh;
  padding: var(--space-md);
  transition: background-color 0.4s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─── Utility ─── */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ─── Glassmorphism Card ─── */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: var(--space-xl);
  transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              box-shadow 0.3s ease, background 0.4s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-lg);
  border-color: var(--accent);
}

@supports not (backdrop-filter: blur(20px)) {
  :root[data-theme="light"] .card { background: rgba(255,255,255,0.94); }
  :root[data-theme="dark"] .card { background: rgba(28,28,30,0.94); }
}

/* ─── Header ─── */
.header {
  text-align: center;
  padding: var(--space-2xl) var(--space-md) var(--space-xl);
  margin-bottom: var(--space-xl);
  position: relative;
}

.header__top {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
}

.theme-toggle {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius-full);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: var(--font-md);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.theme-toggle:hover {
  transform: scale(1.1) rotate(15deg);
  box-shadow: var(--shadow-md);
}

.theme-toggle:active { transform: scale(0.92); }

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ─── Clock (Display Heading) ─── */
.clock-display {
  font-size: var(--font-3xl);
  font-weight: var(--weight-black);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  color: var(--text-primary);
  margin-bottom: var(--space-xs);
}

.date-display {
  font-size: var(--font-base);
  font-weight: var(--weight-regular);
  color: var(--text-secondary);
  letter-spacing: var(--tracking-wide);
  line-height: var(--leading-relaxed);
}

/* ─── Greeting (Subheading) ─── */
.greeting-display {
  font-size: var(--font-xl);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-snug);
  margin-top: var(--space-lg);
  color: var(--text-primary);
}

.name-input-wrapper {
  margin-top: var(--space-md);
}

.name-input {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 0.6rem 1.2rem;
  font-size: var(--font-sm);
  font-family: inherit;
  font-weight: var(--weight-medium);
  color: var(--text-primary);
  text-align: center;
  width: 100%;
  max-width: 220px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.name-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-subtle);
}

.name-input::placeholder {
  color: var(--text-tertiary);
  font-weight: var(--weight-regular);
}

/* ─── Main Content: 960 Grid with Flexbox ─── */
.main-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  max-width: 960px;
  margin: 0 auto;
}

/* ─── Card Header ─── */
.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.card__title {
  font-size: var(--font-md);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  color: var(--text-primary);
}

.card__title i {
  margin-right: 0.3rem;
  color: var(--accent);
  font-size: 0.85em;
}

.card__title--center {
  text-align: center;
  margin-bottom: var(--space-sm);
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 0.55rem 1.1rem;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
  font-family: inherit;
  font-weight: var(--weight-semibold);
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, opacity 0.2s ease;
  min-height: 44px;
  min-width: 44px;
}

.btn:active { transform: scale(0.94); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 2px 10px rgba(0, 113, 227, 0.3);
}

.btn--primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 18px rgba(0, 113, 227, 0.4);
  transform: translateY(-1px);
}

.btn--glass {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--text-primary);
  border: 1.5px solid var(--border-strong);
}

.btn--glass:hover {
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

.btn--round {
  border-radius: var(--radius-full);
  width: 48px;
  height: 48px;
  padding: 0;
}

.btn--small {
  padding: 0.35rem 0.7rem;
  font-size: var(--font-xs);
  min-height: 30px;
  min-width: auto;
  border-radius: var(--radius-sm);
}

.btn--preset {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border-strong);
  padding: 0.35rem 0.65rem;
  font-size: var(--font-sm);
  font-weight: var(--weight-semibold);
  min-height: 34px;
  min-width: 34px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

.btn--preset:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-subtle);
}

.btn--preset.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(0, 113, 227, 0.3);
}

.btn--disabled, .btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

/* ─── Quick Links (compact, centered, bottom) ─── */
.card--links {
  padding: var(--space-lg) var(--space-xl);
  max-width: 360px;
  margin: 0 auto;
  text-align: center;
  width: 100%;
}

.card--links .card__title--center {
  margin-bottom: var(--space-md);
}

.links-grid {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
}

.link-button {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.1rem;
  min-width: 72px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text-primary);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.link-button:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
  background: var(--bg-card-hover);
}

.link-button:active { transform: scale(0.96); }
.link-button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.link-button i {
  font-size: var(--font-md);
  color: var(--accent);
  transition: transform 0.3s ease;
}

.link-button:hover i { transform: scale(1.15); }

.link-name {
  font-size: var(--font-xs);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  letter-spacing: var(--tracking-wide);
}

/* ─── Todo Section ─── */
.todo-form {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
}

.todo-input {
  flex: 1;
  padding: 0.6rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: var(--font-base);
  font-family: inherit;
  font-weight: var(--weight-regular);
  color: var(--text-primary);
  background: transparent;
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.todo-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-subtle);
}

.todo-input::placeholder { color: var(--text-tertiary); }

.todo-error {
  color: var(--error);
  font-size: var(--font-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  min-height: 1rem;
  margin-bottom: var(--space-sm);
}

.todo-list { list-style: none; }

.todo-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  transition: background-color 0.2s ease;
}

.todo-item:last-child { border-bottom: none; }

.todo-item:hover {
  background: var(--accent-subtle);
  border-radius: var(--radius-sm);
  margin: 0 -0.5rem;
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}

.todo-item--completed .todo-text {
  text-decoration: line-through;
  color: var(--text-tertiary);
}

.todo-checkbox {
  width: 20px; height: 20px; min-width: 20px;
  cursor: pointer;
  accent-color: var(--accent);
}

.todo-text {
  flex: 1;
  word-break: break-word;
  font-size: var(--font-base);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking-normal);
  color: var(--text-primary);
}

.todo-delete {
  background: none; border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 0.2rem;
  border-radius: var(--radius-sm);
  font-size: var(--font-sm);
  min-height: 28px; min-width: 28px;
  display: flex; align-items: center; justify-content: center;
  transition: color 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
  opacity: 0;
}

.todo-item:hover .todo-delete { opacity: 1; }
.todo-delete:hover { color: var(--error); transform: scale(1.15); }

.btn--edit {
  background: none; border: none;
  color: var(--text-tertiary);
  cursor: pointer;
  padding: 0.2rem;
  border-radius: var(--radius-sm);
  font-size: var(--font-sm);
  min-height: 28px; min-width: 28px;
  display: flex; align-items: center; justify-content: center;
  transition: color 0.2s ease, transform 0.2s ease, opacity 0.2s ease;
  opacity: 0;
}

.todo-item:hover .btn--edit { opacity: 1; }
.btn--edit:hover { color: var(--accent); transform: scale(1.15); }

.btn--danger { background: none; border: none; color: var(--error); }

.todo-empty {
  text-align: center;
  color: var(--text-tertiary);
  padding: var(--space-2xl) 0;
  font-size: var(--font-base);
  font-weight: var(--weight-regular);
  line-height: var(--leading-relaxed);
  letter-spacing: var(--tracking-normal);
}

.todo-edit-input {
  flex: 1;
  padding: 0.4rem 0.6rem;
  border: 1.5px solid var(--accent);
  border-radius: var(--radius-sm);
  font-size: var(--font-base);
  font-family: inherit;
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  color: var(--text-primary);
  background: transparent;
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.sort-select {
  padding: 0.3rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: var(--font-sm);
  font-family: inherit;
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  background: transparent;
  cursor: pointer;
  min-height: 30px;
}

.sort-select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ─── Timer Section ─── */
.card--timer { text-align: center; }

.timer-display { margin: var(--space-lg) 0 var(--space-md); }

.timer-time {
  font-size: var(--font-3xl);
  font-weight: var(--weight-black);
  color: var(--text-primary);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  font-variant-numeric: tabular-nums;
}

.timer-label {
  font-size: var(--font-xs);
  font-weight: var(--weight-medium);
  color: var(--text-tertiary);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-top: var(--space-sm);
}

.timer-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  justify-content: center;
  margin-bottom: var(--space-md);
}

.timer-custom {
  display: flex;
  gap: var(--space-sm);
  justify-content: center;
  align-items: center;
  margin-bottom: var(--space-lg);
}

.timer-custom-input {
  width: 90px;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: var(--font-xs);
  font-family: inherit;
  font-weight: var(--weight-medium);
  color: var(--text-primary);
  background: transparent;
  text-align: center;
  min-height: 34px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.timer-custom-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-subtle);
}

.timer-custom-input::placeholder { color: var(--text-tertiary); }

.timer-controls {
  display: flex;
  gap: 0.6rem;
  justify-content: center;
  align-items: center;
}

.timer-notification {
  margin-top: var(--space-lg);
  padding: var(--space-md) var(--space-lg);
  background: var(--success);
  color: #fff;
  border-radius: var(--radius-md);
  font-weight: var(--weight-semibold);
  font-size: var(--font-sm);
}

.timer-notification p { margin-bottom: var(--space-sm); }
.timer-notification .btn--small { background: rgba(255,255,255,0.2); color: #fff; border: 1px solid rgba(255,255,255,0.3); }
.timer-notification .btn--small:hover { background: rgba(255,255,255,0.3); }
.timer-notification[hidden] { display: none; }

/* ─── Toast ─── */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-full);
  font-size: var(--font-sm);
  font-weight: var(--weight-medium);
  z-index: 1000;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast[hidden] { display: none; }
.toast--visible { opacity: 1; transform: translateX(-50%) translateY(0); }

.links-error { display: none; }

/* ═══════════════════════════════════
   RESPONSIVE: Mobile-First + 960 Grid
   ═══════════════════════════════════ */

/* ─── Mobile (default, < 640px) ─── */
@media (max-width: 639px) {
  .card {
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
  }

  .clock-display { font-size: var(--font-2xl); }
  .greeting-display { font-size: var(--font-lg); }
  .timer-time { font-size: var(--font-2xl); }

  .btn, .theme-toggle, input, select, a {
    min-height: 44px;
    min-width: 44px;
  }

  .btn--preset { min-height: 40px; min-width: 40px; padding: 0.4rem 0.6rem; }
  .btn--round { width: 44px; height: 44px; }
}

/* ─── Tablet (640px+): 2-column grid ─── */
@media (min-width: 640px) {
  body { padding: var(--space-xl); }

  .header {
    padding: var(--space-2xl) var(--space-md) var(--space-xl);
    margin-bottom: var(--space-xl);
  }

  .clock-display { font-size: var(--font-3xl); }

  .main-content {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
  }

  .card--todo,
  .card--timer {
    flex: 1 1 calc(50% - var(--space-lg) / 2);
    min-width: 280px;
  }

  .card--links {
    flex-basis: 100%;
    max-width: 360px;
    margin: var(--space-sm) auto 0;
  }
}

/* ─── Desktop (960px+): 960-grid flexbox ─── */
@media (min-width: 960px) {
  body { padding: var(--space-2xl); }

  .header {
    padding: var(--space-3xl) var(--space-md) var(--space-2xl);
    margin-bottom: var(--space-2xl);
  }

  .clock-display { font-size: var(--font-4xl); }
  .greeting-display { font-size: var(--font-2xl); }

  .main-content {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xl);
    max-width: 960px;
    margin: 0 auto;
  }

  .card--todo { flex: 1 1 55%; }
  .card--timer { flex: 1 1 40%; }
  .card--links { flex-basis: 100%; max-width: 360px; margin: var(--space-md) auto 0; }

  .card { padding: var(--space-xl); }
}

/* ─── Large (1280px+) ─── */
@media (min-width: 1280px) {
  .main-content { max-width: 1100px; }
  .clock-display { font-size: 5.5rem; }
  .timer-time { font-size: var(--font-4xl); }
}

/* ─── Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ─── GSAP Safety: elements always visible ─── */
.theme-toggle, .btn--preset, .timer-controls .btn,
.link-button, .card__title, .timer-time,
.clock-display, .date-display, .greeting-display,
.name-input-wrapper {
  visibility: visible !important;
}