/* EaseTinnitus — shared design system */

:root {
  --bg: #F5F3EE;
  --surface: #FFFFFF;
  --text: #1B2430;
  --text-muted: #6B7280;
  --text-faint: #9CA3AF;
  --primary: #2A9D8F;
  --primary-dark: #1F7A6E;
  --primary-light: #DFF3F0;
  --accent: #FF6F59;
  --accent-light: #FFE9E4;
  --border: #E7E3DC;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 28px rgba(27, 36, 48, 0.08);
  --shadow-sm: 0 4px 12px rgba(27, 36, 48, 0.06);
  --gradient: linear-gradient(135deg, #34B3A3 0%, #1F7A6E 100%);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

.app-shell {
  max-width: 440px;
  margin: 0 auto;
  min-height: 100vh;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  position: relative;
}

.topbar {
  padding: calc(20px + env(safe-area-inset-top)) 20px 26px;
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--gradient);
  border-radius: 0 0 28px 28px;
  box-shadow: 0 12px 24px rgba(31, 122, 110, 0.28);
  position: relative;
  margin-bottom: 14px;
}

.topbar .back {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  color: #fff;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.topbar h1 {
  font-size: 18px;
  font-weight: 800;
  margin: 0;
  letter-spacing: -0.2px;
  color: #fff;
}

.topbar .sub {
  font-size: 12px;
  color: rgba(255,255,255,0.82);
  margin-top: 2px;
}

.content {
  flex: 1;
  padding: 8px 20px 100px;
}

.bottom-nav {
  position: sticky;
  bottom: 0;
  display: flex;
  justify-content: space-around;
  align-items: center;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 10px 8px calc(10px + env(safe-area-inset-bottom));
  max-width: 440px;
  margin: 0 auto;
  width: 100%;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  color: var(--text-faint);
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

.nav-item .icon { font-size: 19px; }
.nav-item.active { color: var(--primary); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 999px;
  padding: 15px 22px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  transition: transform 0.15s ease, opacity 0.15s ease;
}
.btn:active { transform: scale(0.98); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:disabled { opacity: 0.45; cursor: not-allowed; }
.btn-secondary { background: var(--surface); color: var(--text); box-shadow: var(--shadow-sm); }
.btn-accent { background: var(--accent); color: #fff; }
.btn-ghost { background: transparent; color: var(--primary); }
.btn-row { display: flex; gap: 10px; }
.btn-row .btn { flex: 1; }

/* Cards */
.card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 18px;
  box-shadow: var(--shadow);
  margin-bottom: 14px;
}

.tool-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  margin-bottom: 14px;
}
.tool-card .emoji {
  width: 48px; height: 48px;
  border-radius: 14px;
  background: var(--primary-light);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.tool-card .emoji.c-coral { background: var(--accent-light); }
.tool-card .emoji.c-amber { background: #FFF1D6; }
.tool-card .emoji.c-slate { background: #E7ECF3; }
.tool-card:active { transform: scale(0.985); }
.tool-card .body { flex: 1; }
.tool-card .body h3 { margin: 0 0 3px; font-size: 15px; font-weight: 800; }
.tool-card .body p { margin: 0; font-size: 12.5px; color: var(--text-muted); line-height: 1.4; }
.tool-card .chevron { color: var(--text-faint); font-size: 18px; }

.section-title {
  font-size: 13px;
  font-weight: 800;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin: 20px 0 10px;
}

/* Disclaimer / info banners */
.banner {
  background: var(--primary-light);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--primary-dark);
  margin-bottom: 16px;
}
.banner.warn {
  background: var(--accent-light);
  color: #9c3b2d;
}
.banner strong { font-weight: 800; }

.disclaimer-fine {
  font-size: 10.5px;
  color: var(--text-faint);
  line-height: 1.6;
  text-align: center;
  padding: 18px 8px 6px;
}

/* Chips (duration pickers, mode selectors, range buttons) */
.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 4px;
}
.chip {
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--text);
  border-radius: 999px;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}
.chip.selected {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* Progress dots (wizard) */
.progress-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin: 6px 0 20px;
}
.progress-dots .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--border);
}
.progress-dots .dot.active { background: var(--primary); width: 22px; border-radius: 5px; }
.progress-dots .dot.done { background: var(--primary-dark); }

.step-label {
  font-size: 12px;
  font-weight: 800;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 4px;
}
.step-title { font-size: 20px; font-weight: 800; margin: 0 0 8px; letter-spacing: -0.3px; }
.step-desc { font-size: 13.5px; color: var(--text-muted); line-height: 1.5; margin-bottom: 20px; }

/* Sliders */
.slider-block { margin-bottom: 22px; }
.slider-readout {
  text-align: center;
  font-size: 30px;
  font-weight: 800;
  color: var(--primary-dark);
  margin-bottom: 6px;
}
.slider-readout small { font-size: 14px; color: var(--text-muted); font-weight: 600; }

input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 999px;
  background: var(--border);
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--primary);
  border: 4px solid #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--primary);
  border: 4px solid #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
  cursor: pointer;
}

.tone-toggle {
  width: 64px; height: 64px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  font-size: 24px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 18px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(42,157,143,0.35);
}
.tone-toggle.playing { background: var(--accent); box-shadow: 0 8px 20px rgba(255,111,89,0.35); }

/* Spectrum / audiogram bar */
.spectrum {
  position: relative;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary-light), var(--primary));
  margin: 30px 0 8px;
}
.spectrum .marker {
  position: absolute;
  top: -9px;
  width: 28px; height: 28px;
  margin-left: -14px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid #fff;
  box-shadow: 0 3px 10px rgba(0,0,0,0.25);
}
.spectrum-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: var(--text-faint);
  margin-bottom: 20px;
}

/* Big timer (RI test / sound therapy) */
.big-timer {
  text-align: center;
  font-size: 52px;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text);
  margin: 30px 0 6px;
  font-variant-numeric: tabular-nums;
}
.timer-sub { text-align: center; color: var(--text-muted); font-size: 13px; margin-bottom: 24px; }

.play-toggle {
  width: 92px; height: 92px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  font-size: 30px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 8px;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(42,157,143,0.35);
}
.play-toggle.playing { background: var(--accent); box-shadow: 0 10px 26px rgba(255,111,89,0.35); }

.volume-row { display: flex; align-items: center; gap: 12px; margin: 18px 0; }
.volume-row .icon { font-size: 16px; color: var(--text-muted); }

/* Rating faces */
.rating-row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  margin: 20px 0;
}
.rating-face {
  flex: 1;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 4px;
  text-align: center;
  cursor: pointer;
}
.rating-face .emoji { font-size: 26px; display: block; margin-bottom: 6px; }
.rating-face .label { font-size: 10px; font-weight: 700; color: var(--text-muted); line-height: 1.3; }
.rating-face.selected { border-color: var(--primary); background: var(--primary-light); }

/* Usage / tip card */
.usage-card {
  background: var(--surface);
  border: 1.5px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin: 18px 0;
}
.usage-card .head { font-size: 13px; font-weight: 800; margin-bottom: 6px; }
.usage-card p { font-size: 12.5px; color: var(--text-muted); line-height: 1.55; margin: 0; }

hr.sep { border: none; border-top: 1px solid var(--border); margin: 22px 0; }

/* Splash */
.splash-wrap {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 28px;
  text-align: center;
  background: var(--gradient);
  color: #fff;
}
.splash-logo-badge {
  width: 96px; height: 96px;
  border-radius: 28px;
  background: rgba(255,255,255,0.16);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px;
}
.splash-logo-badge img { width: 60px; height: 60px; }
.splash-name { font-size: 28px; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 6px; color: #fff; }
.splash-tagline { font-size: 14.5px; color: rgba(255,255,255,0.88); line-height: 1.55; margin-bottom: 26px; max-width: 300px; }
.splash-wrap .banner {
  background: rgba(255,255,255,0.14);
  color: rgba(255,255,255,0.92);
  backdrop-filter: blur(2px);
}
.splash-wrap .banner strong { color: #fff; }
.splash-wrap .btn-primary { background: #fff; color: var(--primary-dark); margin-top: 22px; }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14181F;
    --surface: #1D2330;
    --text: #EDEFF3;
    --text-muted: #A2A9B5;
    --text-faint: #6B7280;
    --primary-light: #17332F;
    --accent-light: #3A241F;
    --border: #2A3140;
    --shadow: 0 10px 28px rgba(0,0,0,0.35);
    --shadow-sm: 0 4px 12px rgba(0,0,0,0.3);
  }
}