:root {
  /* Material 3 Expressive / Android 16 Baklava — dark (default) */
  --md-primary:              #D0BCFF;
  --md-on-primary:           #381E72;
  --md-primary-container:    #4F378B;
  --md-on-primary-container: #EADDFF;
  --md-secondary:            #CCC2DC;
  --md-secondary-container:  #4A4458;
  --md-on-secondary-container: #E8DEF8;
  --md-bg:                   #141218;
  --md-on-surface:           #E6E1E5;
  --md-on-surface-variant:   #CAC4D0;
  --md-outline:              #938F99;
  --md-outline-variant:      #49454F;
  --md-surface-container-lowest:  #0F0D13;
  --md-surface-container-low:     #1D1B20;
  --md-surface-container:         #211F26;
  --md-surface-container-high:    #2B2930;
  --md-surface-container-highest: #36343B;
  --md-ref-typeface-brand: 'Google Sans', 'Google Sans Display', system-ui, sans-serif;
}

/* ── Light mode tokens ── */
[data-theme="light"] {
  --md-primary:              #6750A4;
  --md-on-primary:           #FFFFFF;
  --md-primary-container:    #EADDFF;
  --md-on-primary-container: #21005D;
  --md-secondary:            #625B71;
  --md-secondary-container:  #E8DEF8;
  --md-on-secondary-container: #1D192B;
  --md-bg:                   #FFFBFE;
  --md-on-surface:           #1C1B1F;
  --md-on-surface-variant:   #49454F;
  --md-outline:              #79747E;
  --md-outline-variant:      #CAC4D0;
  --md-surface-container-lowest:  #FFFFFF;
  --md-surface-container-low:     #F7F2FA;
  --md-surface-container:         #F3EDF7;
  --md-surface-container-high:    #ECE6F0;
  --md-surface-container-highest: #E6E0E9;
}

/* ── Auto: light when system is light ── */
@media (prefers-color-scheme: light) {
  [data-theme="auto"] {
    --md-primary:              #6750A4;
    --md-on-primary:           #FFFFFF;
    --md-primary-container:    #EADDFF;
    --md-on-primary-container: #21005D;
    --md-secondary:            #625B71;
    --md-secondary-container:  #E8DEF8;
    --md-on-secondary-container: #1D192B;
    --md-bg:                   #FFFBFE;
    --md-on-surface:           #1C1B1F;
    --md-on-surface-variant:   #49454F;
    --md-outline:              #79747E;
    --md-outline-variant:      #CAC4D0;
    --md-surface-container-lowest:  #FFFFFF;
    --md-surface-container-low:     #F7F2FA;
    --md-surface-container:         #F3EDF7;
    --md-surface-container-high:    #ECE6F0;
    --md-surface-container-highest: #E6E0E9;
  }
}

html { transition: background .25s, color .25s; }

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

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--md-bg);
  color: var(--md-on-surface);
  font-family: var(--md-ref-typeface-brand);
  overflow: hidden;
  transition: background .25s, color .25s;
}

/* ── Animated background blobs ── */
.bg-blobs {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.12;
  animation: float-blob 12s ease-in-out infinite;
}

.blob-1 { width: 400px; height: 400px; background: #D0BCFF; top: -100px; left: -100px; animation-delay: 0s; }
.blob-2 { width: 300px; height: 300px; background: #CCC2DC; bottom: -80px; right: -80px; animation-delay: -4s; }
.blob-3 { width: 200px; height: 200px; background: #B69DF8; top: 50%; left: 50%; transform: translate(-50%, -50%); animation-delay: -8s; }

@keyframes float-blob {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(30px, -20px) scale(1.05); }
  66%       { transform: translate(-20px, 15px) scale(0.95); }
}

/* ── Theme toggle (segmented pill) ── */
.theme-toggle {
  position: absolute;
  top: 14px;
  right: 14px;
  display: flex;
  align-items: center;
  background: var(--md-surface-container-highest);
  border-radius: 9999px;
  padding: 4px;
  gap: 2px;
  transition: background .25s;
  z-index: 2;
}

.theme-btn {
  border: none;
  background: transparent;
  border-radius: 9999px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--md-on-surface-variant);
  transition: background .2s, color .2s, transform .15s cubic-bezier(.34,1.56,.64,1);
  flex-shrink: 0;
  padding: 0;
}

.theme-btn:active { transform: scale(.88); }

.theme-btn.active {
  background: var(--md-primary);
  color: var(--md-on-primary);
}

.icon-mobile { display: none; }
html.is-mobile .icon-desktop { display: none; }
html.is-mobile .icon-mobile  { display: block; }

/* ── Main card ── */
.card {
  position: relative;
  z-index: 1;
  background: var(--md-surface-container);
  border-radius: 28px;
  padding: 2.5rem 2.5rem 2rem;
  width: min(380px, calc(100vw - 2rem));
  text-align: center;
  box-shadow:
    0 1px 2px rgba(0,0,0,0.3),
    0 4px 6px rgba(0,0,0,0.15),
    0 12px 20px rgba(0,0,0,0.12);
  animation: card-enter 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  transition: background .25s, box-shadow .25s;
}

@keyframes card-enter {
  from { opacity: 0; transform: translateY(24px) scale(0.95); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

/* ── Timer ring ── */
.timer-ring {
  position: relative;
  width: 140px;
  height: 140px;
  margin: 0 auto 2rem;
}

.timer-ring svg {
  transform: rotate(-90deg);
  filter: drop-shadow(0 0 14px rgba(208, 188, 255, 0.3));
}

.timer-ring circle { fill: none; stroke-width: 6; }

.track { stroke: var(--md-surface-container-highest); }
.progress {
  stroke: var(--md-primary);
  stroke-linecap: round;
  stroke-dasharray: 376;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear, stroke .25s;
}

.timer-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.timer-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--md-primary);
  line-height: 1;
  letter-spacing: -1px;
  animation: pulse-number 1s ease-in-out;
  transition: color .25s;
}

@keyframes pulse-number {
  0%   { transform: scale(1.2); opacity: 0.6; }
  100% { transform: scale(1);   opacity: 1; }
}

.timer-label {
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--md-on-surface-variant);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* ── Headline ── */
h1 {
  font-size: 1.375rem;
  font-weight: 500;
  color: var(--md-on-surface);
  letter-spacing: -0.01em;
  line-height: 1.35;
  margin-bottom: 0.5rem;
}

/* ── URL chip ── */
.url-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--md-surface-container-high);
  border: 1px solid var(--md-outline-variant);
  border-radius: 12px;
  padding: 0.5rem 0.875rem;
  margin: 0.875rem 0 1.5rem;
  max-width: 100%;
  overflow: hidden;
  transition: background .25s, border-color .25s;
}

.url-chip-icon { width: 14px; height: 14px; flex-shrink: 0; opacity: 0.6; }

.url-chip-text {
  font-size: 0.8rem;
  color: var(--md-on-surface-variant);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Action row ── */
.action-row {
  display: flex;
  gap: 10px;
  justify-content: center;
  align-items: stretch;
}

.action-row .btn,
.action-row .btn-stop {
  flex: 1;
}

/* ── Button ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0.75rem 1.75rem;
  border: none;
  border-radius: 9999px;
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  font-family: var(--md-ref-typeface-brand);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  text-decoration: none;
  transition: background .2s, transform .15s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow .2s;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: currentColor;
  opacity: 0;
  border-radius: inherit;
  transition: opacity .2s;
}

.btn:hover {
  background: var(--md-primary);
  color: var(--md-on-primary);
  transform: scale(1.04);
  box-shadow: 0 4px 16px rgba(208, 188, 255, 0.25);
}

.btn:active { transform: scale(0.97); }
.btn svg { flex-shrink: 0; }

/* ── Stop button ── */
.btn-stop {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0.75rem 1.75rem;
  border: 1px solid var(--md-outline-variant);
  border-radius: 9999px;
  background: transparent;
  color: var(--md-on-surface-variant);
  font-family: var(--md-ref-typeface-brand);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: background .2s, border-color .2s, color .2s,
              transform .15s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.btn-stop:hover {
  background: var(--md-surface-container-high);
  border-color: var(--md-outline);
  color: var(--md-on-surface);
}

.btn-stop:active { transform: scale(0.97); }
.btn-stop svg { flex-shrink: 0; }

.btn-stop.stopped {
  border-color: var(--md-outline-variant);
  color: var(--md-outline);
  cursor: default;
  pointer-events: none;
  opacity: 0.6;
}

/* ── Bottom hint ── */
.hint {
  margin-top: 1.25rem;
  font-size: 0.75rem;
  color: var(--md-outline);
  letter-spacing: 0.01em;
}