/* SymptomTrack landing — dark glass theme (aligned with app GlassConfig) */

:root {
  --bg: #000000;
  --text: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.72);
  --accent: #007aff;
  --accent-hover: #0062cc;
  --glass-bg: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.16);
  --glass-border-accent: rgba(0, 122, 255, 0.35);
  --radius-card: 20px;
  --radius-button: 14px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --max-width: 720px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-brand: ui-rounded, "SF Pro Rounded", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.ambient {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.ambient::before,
.ambient::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
}

.ambient::before {
  width:  min(90vw, 520px);
  height: min(90vw, 520px);
  top: -12%;
  left: -20%;
  background: radial-gradient(circle, rgba(0, 122, 255, 0.14) 0%, transparent 70%);
}

.ambient::after {
  width:  min(80vw, 460px);
  height: min(80vw, 460px);
  bottom: -8%;
  right: -18%;
  background: radial-gradient(circle, rgba(88, 86, 214, 0.12) 0%, transparent 70%);
}

.wrap {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
  padding-block: 1.25rem 3rem;
}

/* Header */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text);
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.brand span {
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.lang-switch {
  display: flex;
  gap: 0.25rem;
  padding: 4px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-button);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.lang-switch button {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 0.35rem 0.6rem;
  border-radius: 10px;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.lang-switch button.active {
  background: rgba(0, 122, 255, 0.25);
  color: var(--text);
}

.lang-switch button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Glass card */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
}

/* Hero */
.hero {
  text-align: center;
  padding: 2rem 1.25rem 2.25rem;
  margin-bottom: 1.5rem;
  border-color: var(--glass-border-accent);
}

.hero-logo {
  width: 88px;
  height: 88px;
  border-radius: 20px;
  margin-bottom: 1.25rem;
  box-shadow: 0 4px 24px rgba(0, 122, 255, 0.2);
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-family: var(--font-brand);
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.hero .tagline {
  margin: 0 0 1.25rem;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.5;
  max-width: min(36rem, 92vw);
  margin-inline: auto;
}

.hero .sub {
  margin: 0 0 1.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.btn-app-store {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 52px;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  font-size: 1.05rem;
  text-decoration: none;
  border-radius: var(--radius-button);
  border: 1.5px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.35);
  transition: background 0.2s, transform 0.15s;
}

.btn-app-store:hover {
  background: var(--accent-hover);
}

.btn-app-store:active {
  transform: scale(0.98);
}

.btn-app-store svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

/* Sections */
section {
  margin-bottom: 1.25rem;
}

section h2 {
  margin: 0 0 1rem;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-inner {
  padding: 1.25rem 1.25rem 1.35rem;
}

.feature-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 1.35rem;
  margin-bottom: 0.65rem;
  color: var(--text-secondary);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.feature-list li:last-child {
  margin-bottom: 0;
}

/* Premium grid */
.tier-grid {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 480px) {
  .tier-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.tier {
  padding: 1rem;
  border-radius: var(--radius-button);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
}

.tier h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  color: var(--accent);
}

.tier ul {
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.tier-note {
  margin: 1rem 0 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Screenshots — horizontal scroll carousel */
.shots-carousel-wrap {
  margin-inline: -0.5rem;
}

.shots {
  display: flex;
  flex-direction: row;
  gap: 0.75rem;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding: 0.25rem 0.5rem 0.5rem;
}

.shots::-webkit-scrollbar {
  display: none;
}

.shot {
  flex: 0 0 auto;
  scroll-snap-align: center;
  scroll-snap-stop: always;
  margin-inline: 0;
  width: fit-content;
  max-width: min(78vw, 260px);
  border-radius: 24px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  line-height: 0;
}

.shot img {
  width: auto;
  max-width: min(78vw, 260px);
  height: auto;
  max-height: min(52vh, 480px);
  display: block;
  vertical-align: top;
}

.shots-hint {
  margin: 0.5rem 0 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.shot-caption {
  display: none;
}

/* YouTube Short embed (9:16) */
.video-embed {
  max-width: 360px;
  margin: 0 auto;
  aspect-ratio: 9 / 16;
  border-radius: var(--radius-button);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-card);
}

.video-embed iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 1.5rem 1rem 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.site-footer a:not(.btn-app-store) {
  color: var(--accent);
  text-decoration: none;
}

.site-footer a:not(.btn-app-store):hover {
  text-decoration: underline;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem 1.25rem;
  margin-bottom: 1rem;
}

.site-footer .btn-app-store {
  margin-bottom: 1.25rem;
  font-size: 0.95rem;
  min-height: 46px;
  color: #fff;
  text-decoration: none;
}

.site-footer .btn-app-store:hover {
  text-decoration: none;
}

.hidden {
  display: none !important;
}