/* ============================================
   TOWEL GRIP - Modern Dark Design
   Smartphone-first
   ============================================ */

/* ---------- Variables ---------- */
:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --bg-elevated: #334155;
  --border-color: rgba(148, 163, 184, 0.2);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-pink: #ff1481;
  --accent-orange: #ff7e5f;
  --accent-green: #22c55e;
  --gradient-primary: linear-gradient(135deg, #ff1481 0%, #ff7e5f 100%);
  --gradient-green: linear-gradient(135deg, #22c55e 0%, #4ade80 100%);
  --gradient-red: linear-gradient(135deg, #ef4444 0%, #f97316 100%);
  --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.4);
  --radius-lg: 24px;
  --radius-sm: 12px;
  --radius-full: 9999px;
  --font-body: 'Yu Gothic UI', 'Meiryo', 'Hiragino Kaku Gothic ProN', sans-serif;
  --transition-fast: 0.2s ease;
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  background-image:
    radial-gradient(ellipse at 20% -10%, rgba(255, 20, 129, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 90% 10%, rgba(255, 126, 95, 0.08) 0%, transparent 50%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  min-height: 100dvh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

select {
  font-family: inherit;
  -webkit-appearance: none;
  appearance: none;
}

/* ---------- Header ---------- */
.header {
  padding: 0.75rem 1rem 0.5rem;
  text-align: center;
  flex-shrink: 0;
}

.header__title {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  font-weight: 900;
  font-family: 'Arial Black', 'Arial Bold', 'Yu Gothic UI', 'Meiryo', sans-serif;
  letter-spacing: 0.15em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  text-transform: uppercase;
  text-shadow: none;
}

.header__logo {
  width: 2rem;
  height: 2rem;
  margin-right: 0.5rem;
  flex-shrink: 0;
  border-radius: 8px;
  -webkit-text-fill-color: initial;
}

.header__version {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  margin-top: 0.25rem;
}

/* ---------- Main ---------- */
.main {
  flex: 1;
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 0.5rem 1rem 4rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 0.75rem;
  min-height: 0;
}

/* ---------- Form Card ---------- */
.main__form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.6rem 0.9rem;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.main__form__voice-icon {
  width: 1.2rem;
  height: 1.2rem;
  flex-shrink: 0;
  object-fit: contain;
}

/* ---------- Voice Select ---------- */
.main__form__item__select {
  flex: 1;
  min-width: 0;
  padding: 0.6rem 2.2rem 0.6rem 0.8rem;
  font-size: 0.9rem;
  color: var(--text-primary);
  background-color: var(--bg-elevated);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.7rem center;
  background-size: 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.main__form__item__select:focus {
  outline: none;
  border-color: var(--accent-pink);
  box-shadow: 0 0 0 3px rgba(255, 20, 129, 0.15);
}

.main__form__item__select option {
  background-color: var(--bg-elevated);
  color: var(--text-primary);
}

/* ---------- Progress Display ---------- */
.main__progress {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1rem 1rem;
  text-align: center;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.main__progress__set {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--accent-orange);
  text-transform: uppercase;
}

.main__progress__status {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  min-height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.main__progress__countdown {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  color: var(--text-primary);
  min-height: 3rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.main__progress__countdown.is-active {
  color: var(--accent-pink);
  text-shadow: 0 0 30px rgba(255, 20, 129, 0.3);
}

.main__progress__countdown.is-break {
  color: var(--accent-green);
  text-shadow: 0 0 30px rgba(34, 197, 94, 0.3);
}

/* ---------- Control Buttons ---------- */
.main__form--controls {
  background: transparent;
  border: none;
  box-shadow: none;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-full);
  color: #fff;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
  position: relative;
  flex-shrink: 0;
}

.icon-btn__icon {
  width: 1.3rem;
  height: 1.3rem;
  display: block;
}

.icon-btn:active {
  transform: scale(0.92);
}

.icon-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  transform: scale(1);
  box-shadow: none !important;
}

.icon-btn--start {
  background: var(--gradient-green);
  box-shadow: 0 8px 24px rgba(34, 197, 94, 0.35);
  padding-left: 0.3rem;
}

.icon-btn--start:hover:not(:disabled) {
  box-shadow: 0 12px 32px rgba(34, 197, 94, 0.5);
  transform: translateY(-2px);
}

.icon-btn--pause {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  color: var(--text-primary);
}

.icon-btn--pause:hover:not(:disabled) {
  background: var(--bg-secondary);
  border-color: var(--text-secondary);
  transform: translateY(-2px);
}

.icon-btn--stop {
  background: var(--gradient-red);
  box-shadow: 0 8px 24px rgba(239, 68, 68, 0.35);
}

.icon-btn--stop:hover:not(:disabled) {
  box-shadow: 0 12px 32px rgba(239, 68, 68, 0.5);
  transform: translateY(-2px);
}

.icon-btn__label {
  position: absolute;
  bottom: -1.4rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  white-space: nowrap;
  text-transform: uppercase;
}

.main__form--controls .main__form__item {
  margin-bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

/* ---------- Android Download Button ---------- */
.android-download {
  display: table;
  margin: 0 auto 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--gradient-green);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-decoration: none;
  border-radius: var(--radius-full);
  box-shadow: 0 8px 24px rgba(34, 197, 94, 0.35);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.android-download__icon {
  display: inline-block;
  vertical-align: middle;
  width: 1.3rem;
  height: 1.3rem;
  margin-right: 0.5rem;
  flex-shrink: 0;
}

.android-download__label {
  display: inline-block;
  vertical-align: middle;
  white-space: nowrap;
}

.android-download:hover {
  box-shadow: 0 12px 32px rgba(34, 197, 94, 0.5);
  transform: translateY(-2px);
}

.android-download:active {
  transform: scale(0.95);
}

/* ---------- Footer ---------- */
.footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 0.25rem;
  text-align: center;
  background: var(--bg-primary);
  z-index: 10;
}

.footer p {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

/* ============================================
   Tablet (768px ~)
   ============================================ */
@media (min-width: 768px) {
  .header {
    padding: 1rem 2rem 0.75rem;
  }

  .header__title {
    font-size: 2.25rem;
  }

  .header__logo {
    width: 2.5rem;
    height: 2.5rem;
    margin-right: 0.6rem;
    border-radius: 10px;
  }

  .header__version {
    font-size: 0.8rem;
    margin-top: 0.3rem;
  }

  .main {
    padding: 0.75rem 2rem 4rem;
    gap: 1rem;
  }

  .main__progress {
    padding: 1.5rem 2rem;
  }

  .main__progress__countdown {
    font-size: 3.5rem;
    min-height: 4.2rem;
  }

  .icon-btn {
    width: 4rem;
    height: 4rem;
  }
}

/* ============================================
   Desktop (1024px ~)
   ============================================ */
@media (min-width: 1024px) {
  .main {
    max-width: 560px;
  }
}

/* ---------- Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}