:root {
  --color-navy: #0a3d6e;
  --color-navy-deep: #041e36;
  --color-cyan: #00b4e4;
  --color-cyan-light: #5ec8f2;
  --home-bg-gradient: linear-gradient(
    168deg,
    #0e5285 0%,
    var(--color-navy) 32%,
    #072f52 68%,
    var(--color-navy-deep) 100%
  );
  --home-text: #ffffff;
  --home-muted: rgba(168, 228, 247, 0.88);
  --menu-content-max: 1000px;
}

html {
  font-size: 12px;
  touch-action: manipulation;
}

body.menu-sub-page {
  margin: 0;
  min-height: 100dvh;
  font-family: 'Kanit', system-ui, sans-serif;
  font-size: 1rem;
  color: var(--home-text);
  background: radial-gradient(ellipse 75% 50% at 50% -5%, rgba(0, 180, 228, 0.28) 0%, transparent 55%),
    radial-gradient(circle at 90% 85%, rgba(45, 143, 212, 0.18) 0%, transparent 45%),
    var(--home-bg-gradient);
  -webkit-font-smoothing: antialiased;
}

.menu-page-shell {
  min-height: 100dvh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(0.75rem, 2vw, 1.5rem);
  padding-bottom: calc(clamp(0.75rem, 2vw, 1.5rem) + env(safe-area-inset-bottom, 0px));
  box-sizing: border-box;
}

.menu-page-wrap {
  width: 100%;
  max-width: var(--menu-content-max);
  display: flex;
  flex-direction: column;
}

.menu-page-header {
  margin-bottom: 1rem;
  padding: 0.25rem 0 0.5rem;
}

.menu-page-header h1 {
  margin: 0.5rem 0 0.15rem;
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  font-weight: 600;
  line-height: 1.35;
  background: linear-gradient(90deg, var(--color-cyan-light), var(--color-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.menu-page-header__sub {
  margin: 0;
  font-size: 0.92rem;
  color: var(--home-muted);
  line-height: 1.45;
}

.menu-page-back {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--home-muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.menu-page-back:hover {
  color: var(--home-text);
}

.menu-page-body {
  width: 100%;
}

.menu-mockup {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.menu-page-card {
  background: #fff;
  border-radius: 16px;
  padding: 1.5rem;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.22);
  color: #1a2b3c;
  text-align: center;
}

.menu-page-card--error h2 {
  margin: 0 0 0.5rem;
  color: var(--color-navy);
}

.menu-page-card--error p {
  margin: 0 0 1.25rem;
  color: #5a7a94;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.25rem;
  border-radius: 10px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-cyan), #1a8fc9);
  color: #fff;
}

.btn-block {
  width: 100%;
}

@media (min-width: 768px) {
  .menu-page-shell {
    align-items: flex-start;
    padding-top: 1.25rem;
  }
}

/* Chat AI — full-height layout */
body.menu-sub-page--chat-ai {
  overflow: hidden;
}

body.menu-sub-page--chat-ai .menu-page-shell {
  align-items: stretch;
  min-height: 100dvh;
  height: 100dvh;
  max-height: 100dvh;
  padding: clamp(0.5rem, 1.5vw, 0.85rem);
  padding-bottom: calc(clamp(0.5rem, 1.5vw, 0.85rem) + env(safe-area-inset-bottom, 0px));
  box-sizing: border-box;
}

body.menu-sub-page--chat-ai .menu-page-wrap {
  flex: 1;
  min-height: 0;
  max-width: min(100%, 920px);
  display: flex;
  flex-direction: column;
}

body.menu-sub-page--chat-ai .menu-page-header {
  flex-shrink: 0;
  margin-bottom: 0.5rem;
  padding-bottom: 0.25rem;
}

body.menu-sub-page--chat-ai .menu-page-header h1 {
  margin-top: 0.35rem;
  font-size: clamp(1.15rem, 2.2vw, 1.45rem);
}

body.menu-sub-page--chat-ai .menu-page-header__sub {
  font-size: 0.85rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

body.menu-sub-page--chat-ai .menu-page-body {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

body.menu-sub-page--chat-ai .menu-mockup--ai {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

@media (min-width: 768px) {
  body.menu-sub-page--chat-ai .menu-page-shell {
    padding-top: 0.75rem;
  }
}

/* Device connect — distinct page atmosphere */
body.menu-sub-page--device-connect {
  background:
    radial-gradient(ellipse 80% 55% at 50% -8%, rgba(26, 188, 156, 0.24) 0%, transparent 58%),
    radial-gradient(circle at 12% 88%, rgba(0, 180, 228, 0.14) 0%, transparent 42%),
    radial-gradient(circle at 88% 72%, rgba(39, 174, 96, 0.12) 0%, transparent 38%),
    var(--home-bg-gradient);
}

body.menu-sub-page--device-connect .menu-page-header.is-device-connect-header-entering {
  opacity: 0;
  transform: translateY(-12px);
}

body.menu-sub-page--device-connect .menu-page-header.is-device-connect-header-entered {
  opacity: 1;
  transform: none;
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

body.menu-sub-page--device-connect .menu-page-header h1 {
  background: linear-gradient(90deg, #7bedd9, #1abc9c, #00b4e4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

body.menu-sub-page--cgm-connect {
  background:
    radial-gradient(ellipse 80% 55% at 50% -8%, rgba(22, 160, 133, 0.26) 0%, transparent 58%),
    radial-gradient(circle at 12% 88%, rgba(0, 180, 228, 0.14) 0%, transparent 42%),
    radial-gradient(circle at 88% 72%, rgba(39, 174, 96, 0.12) 0%, transparent 38%),
    var(--home-bg-gradient);
}

body.menu-sub-page--cgm-connect .menu-page-header.is-device-connect-header-entering {
  opacity: 0;
  transform: translateY(-12px);
}

body.menu-sub-page--cgm-connect .menu-page-header.is-device-connect-header-entered {
  opacity: 1;
  transform: none;
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

body.menu-sub-page--cgm-connect .menu-page-header h1 {
  background: linear-gradient(90deg, #7bedd9, #16a085, #00b4e4);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

@media (prefers-reduced-motion: reduce) {
  body.menu-sub-page--device-connect .menu-page-header.is-device-connect-header-entering,
  body.menu-sub-page--device-connect .menu-page-header.is-device-connect-header-entered {
    opacity: 1;
    transform: none;
    transition: none;
  }

  body.menu-sub-page--cgm-connect .menu-page-header.is-device-connect-header-entering,
  body.menu-sub-page--cgm-connect .menu-page-header.is-device-connect-header-entered {
    opacity: 1;
    transform: none;
    transition: none;
  }
}