:root {
  color-scheme: light dark;
  --brand-color: #ffae00;
  --brand-dark: #ff8800;
  --background: #fef6dd;
  --background-dark: #1b1b1b;
  --surface: #ffffff;
  --surface-dark: #2b2b2b;
  --text-primary: #222222;
  --text-primary-dark: #f5f5f5;
  --text-secondary: #4b4b4b;
  --text-secondary-dark: #bdbdbd;
  --shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  --shadow-dark: 0 20px 40px rgba(0, 0, 0, 0.5);
  --radius: 28px;
  font-family: "Poppins", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--background);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
}

@media (prefers-color-scheme: dark) {
  body {
    background: var(--background-dark);
    color: var(--text-primary-dark);
  }
}

.page-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: clamp(1.25rem, 4vh, 2.5rem) clamp(1.5rem, 5vw, 4rem)
    clamp(0.75rem, 3vh, 1.5rem);
  background: var(--background);
  background: color-mix(in srgb, var(--background) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

@media (prefers-reduced-transparency: reduce) {
  .page-header {
    backdrop-filter: none;
  }
}

@media (prefers-color-scheme: dark) {
  .page-header {
    background: var(--background-dark);
    background: color-mix(in srgb, var(--background-dark) 90%, transparent);
    border-bottom-color: rgba(255, 255, 255, 0.1);
  }
}

.brand__title {
  font-size: clamp(2.4rem, 6vw, 4rem);
  margin: 0;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--brand-dark);
}

.brand__tagline {
  margin: 0.5rem 0 0;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
}

.current-time {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  text-align: right;
}

.current-time__label {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
}

.current-time__value {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-variant-numeric: tabular-nums;
  margin-top: 0.25rem;
}

.app {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem clamp(1rem, 4vw, 3rem) 3rem;
}

.alarm-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: min(720px, 100%);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

@media (prefers-color-scheme: dark) {
  .alarm-card {
    background: var(--surface-dark);
    box-shadow: var(--shadow-dark);
  }
}

.alarm-card__body {
  padding: clamp(1.5rem, 5vw, 3rem);
}

.alarm-card__title {
  margin: 0 0 1.5rem;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
}

.alarm-form {
  display: grid;
  gap: 1.75rem;
}

.alarm-form__field label,
.alarm-form__field legend {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

#alarm-time {
  font: inherit;
  padding: 0.75rem 1rem;
  border: 2px solid rgba(0, 0, 0, 0.1);
  border-radius: 16px;
  min-width: 220px;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.08);
}

@media (prefers-color-scheme: dark) {
  #alarm-time {
    border-color: rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.05);
    color: inherit;
  }
}

.field-hint {
  margin: 0.5rem 0 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.sound-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
}

.sound-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1rem;
  border-radius: 14px;
  border: 2px solid transparent;
  background: rgba(255, 174, 0, 0.1);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.sound-option input[type="radio"] {
  width: 1.1rem;
  height: 1.1rem;
}

.sound-option:has(input[type="radio"]:checked) {
  border-color: var(--brand-dark);
  background: rgba(255, 174, 0, 0.2);
}

.sound-controls {
  display: flex;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.button {
  font: inherit;
  font-weight: 600;
  border: none;
  border-radius: 999px;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  box-shadow: none;
}

.button--primary {
  background: linear-gradient(135deg, var(--brand-color), var(--brand-dark));
  color: #111;
  box-shadow: 0 12px 20px rgba(255, 174, 0, 0.35);
}

.button--primary:not(:disabled):hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 26px rgba(255, 174, 0, 0.4);
}

.button--ghost {
  background: rgba(0, 0, 0, 0.05);
  color: inherit;
}

@media (prefers-color-scheme: dark) {
  .button--ghost {
    background: rgba(255, 255, 255, 0.08);
  }
}

.button--ghost:not(:disabled):hover {
  background: rgba(0, 0, 0, 0.12);
}

.alarm-form__actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.alarm-card__footer {
  padding: 1.5rem clamp(1.5rem, 5vw, 3rem);
  background: rgba(0, 0, 0, 0.04);
}

@media (prefers-color-scheme: dark) {
  .alarm-card__footer {
    background: rgba(255, 255, 255, 0.05);
  }
}

.alarm-status {
  margin: 0;
  font-weight: 600;
}

.alarm-countdown {
  margin: 0.75rem 0 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.page-footer {
  padding: 2rem clamp(1.5rem, 5vw, 4rem) 3rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.page-footer__notice {
  margin: 1.5rem 0 0;
  font-size: 0.75rem;
  color: color-mix(in srgb, var(--text-secondary) 70%, transparent);
}

.page-footer__notice-link {
  color: inherit;
  text-decoration: underline;
}

.page-footer__notice-link:focus,
.page-footer__notice-link:hover {
  color: var(--text-secondary);
}

.alarm-ringing {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  display: grid;
  place-items: center;
  backdrop-filter: blur(3px);
  padding: 1.5rem;
  z-index: 1000;
}

.alarm-ringing[hidden] {
  display: none;
}

.alarm-ringing__dialog {
  background: var(--surface);
  color: inherit;
  padding: 2rem clamp(1.5rem, 4vw, 2.5rem);
  border-radius: 24px;
  text-align: center;
  box-shadow: var(--shadow);
  max-width: 420px;
}

@media (prefers-color-scheme: dark) {
  .alarm-ringing__dialog {
    background: var(--surface-dark);
    box-shadow: var(--shadow-dark);
  }
}

.alarm-ringing__dialog h2 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
}

.alarm-ringing__dialog p {
  margin: 0 0 1.5rem;
  color: var(--text-secondary);
}

.alarm-ringing__actions {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
}

@media (max-width: 640px) {
  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .current-time {
    align-items: flex-start;
    text-align: left;
  }

  .alarm-form__actions,
  .sound-controls,
  .alarm-ringing__actions {
    flex-direction: column;
    width: 100%;
  }

  .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}