/* Material 3 Expressive — capa visual progresiva */
:root {
  --m3-primary: #3451d1;
  --m3-on-primary: #ffffff;
  --m3-primary-container: #dce1ff;
  --m3-on-primary-container: #07164f;
  --m3-secondary-container: #e2e3f4;
  --m3-tertiary-container: #ffd9e5;
  --m3-surface: #f9f9ff;
  --m3-surface-container: #eff0f8;
  --m3-surface-container-high: #e8e9f1;
  --m3-outline: #777680;
  --m3-shadow: 0 10px 30px rgba(35, 43, 83, .12);
  --m3-radius-small: 14px;
  --m3-radius-medium: 22px;
  --m3-radius-large: 30px;
  --m3-radius-xl: 38px;
}

body.m3-expressive {
  background:
    radial-gradient(circle at 12% -10%, rgba(220, 225, 255, .9), transparent 32rem),
    var(--m3-surface);
}

.m3-expressive .sidebar {
  width: 248px;
  background: rgba(249, 249, 255, .92);
  backdrop-filter: blur(18px);
  border-right: 0;
  padding: 22px 16px;
}

.m3-expressive .brand {
  font-size: 22px;
  padding: 5px 14px 24px;
}

.m3-expressive .nav-btn {
  min-height: 52px;
  border-radius: 26px;
  padding: 12px 16px;
  transition: transform .18s ease, background .18s ease, color .18s ease;
}

.m3-expressive .nav-btn:hover { transform: translateX(3px); }
.m3-expressive .nav-btn.active {
  background: var(--m3-primary-container);
  color: var(--m3-on-primary-container);
}

.m3-expressive .main {
  max-width: 1040px;
  padding-top: 34px;
}

.m3-expressive .hero {
  padding: 8px 2px 14px;
}

.m3-expressive .hero h1 {
  font-size: clamp(30px, 5vw, 48px);
  letter-spacing: -.04em;
  line-height: 1.08;
}

.m3-expressive .card {
  border: 0;
  border-radius: var(--m3-radius-large);
  background: rgba(255, 255, 255, .88);
  box-shadow: 0 1px 0 rgba(31, 39, 74, .05), 0 8px 28px rgba(31, 39, 74, .06);
  padding: 22px 24px;
  transition: transform .2s ease, box-shadow .2s ease;
}

.m3-expressive .card:hover {
  box-shadow: var(--m3-shadow);
}

.m3-expressive .brief {
  background: linear-gradient(145deg, #18224f, #32489b);
  border-radius: var(--m3-radius-xl) var(--m3-radius-medium) var(--m3-radius-xl) var(--m3-radius-medium);
}

.m3-expressive .alert {
  border-radius: 20px;
  padding: 14px 16px;
}

.m3-expressive .btn {
  min-height: 44px;
  border-radius: 22px;
  padding: 10px 20px;
  background: var(--m3-primary);
  box-shadow: none;
  transition: transform .16s ease, box-shadow .16s ease, filter .16s ease;
}

.m3-expressive .btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(52, 81, 209, .22);
}

.m3-expressive .btn:active:not(:disabled) { transform: scale(.97); }
.m3-expressive .btn.ghost { background: var(--m3-secondary-container); border: 0; color: #30334d; }
.m3-expressive .btn.danger { min-height: 40px; background: transparent; box-shadow: none; }

.m3-expressive input[type="text"],
.m3-expressive input[type="email"],
.m3-expressive input[type="password"],
.m3-expressive input[type="number"],
.m3-expressive input[type="date"],
.m3-expressive input[type="datetime-local"],
.m3-expressive textarea,
.m3-expressive select {
  min-height: 52px;
  border: 1px solid transparent;
  border-radius: 18px;
  background: var(--m3-surface-container);
  padding: 13px 16px;
  transition: background .16s ease, box-shadow .16s ease, border .16s ease;
}

.m3-expressive textarea { min-height: 104px; }
.m3-expressive input:focus,
.m3-expressive textarea:focus,
.m3-expressive select:focus {
  outline: 0;
  border-color: var(--m3-primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(52, 81, 209, .12);
}

.m3-expressive .task {
  border-bottom-color: rgba(119, 118, 128, .14);
  padding: 12px 2px;
}

.m3-expressive .chip {
  border: 0;
  background: var(--m3-surface-container);
  padding: 5px 10px;
}

.m3-expressive .msg {
  padding: 13px 17px;
  border-radius: 24px;
}
.m3-expressive .msg.user { background: var(--m3-primary); border-bottom-right-radius: 8px; }
.m3-expressive .msg.assistant { border: 0; box-shadow: 0 4px 18px rgba(31, 39, 74, .07); border-bottom-left-radius: 8px; }

.m3-expressive .fab {
  width: auto;
  min-width: 64px;
  height: 64px;
  border-radius: 22px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--m3-primary-container);
  color: var(--m3-on-primary-container);
  box-shadow: 0 12px 26px rgba(31, 45, 108, .24);
  font-size: 25px;
  transition: transform .18s ease, border-radius .18s ease;
}
.m3-expressive .fab b { font-size: 14px; }
.m3-expressive .fab:hover { transform: translateY(-3px); border-radius: 32px; }
.m3-expressive .fab:active { transform: scale(.94); }

.m3-api-banner {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 18px;
  padding: 16px 18px;
  border-radius: 28px 14px 28px 14px;
  background: var(--m3-tertiary-container);
  color: #35101d;
  box-shadow: 0 8px 24px rgba(80, 30, 48, .08);
}
.m3-api-banner > span:nth-child(2) { flex: 1; display: flex; flex-direction: column; }
.m3-api-banner small { opacity: .72; margin-top: 2px; }
.m3-api-symbol {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #fff4f7;
  font-size: 23px;
}

.m3-private-badge {
  display: inline-flex;
  width: fit-content;
  padding: 6px 11px;
  border-radius: 999px;
  background: var(--m3-primary-container);
  color: var(--m3-on-primary-container);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}
.m3-key-card { background: linear-gradient(145deg, #fff, #f0f2ff) !important; }
.m3-invite-card { background: linear-gradient(145deg, #fff, #f8f1ff) !important; }

.m3-sheet-overlay,
.m3-onboarding-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  justify-content: center;
  background: rgba(18, 20, 34, .44);
  opacity: 0;
  transition: opacity .18s ease;
  backdrop-filter: blur(4px);
}
.m3-sheet-overlay.visible,
.m3-onboarding-overlay.visible { opacity: 1; }

.m3-sheet-overlay { align-items: flex-end; }
.m3-more-sheet {
  width: min(680px, 100%);
  padding: 12px 20px calc(24px + env(safe-area-inset-bottom));
  border-radius: 32px 32px 0 0;
  background: var(--m3-surface);
  transform: translateY(25px);
  transition: transform .22s cubic-bezier(.2, .8, .2, 1);
}
.m3-sheet-overlay.visible .m3-more-sheet { transform: translateY(0); }
.m3-sheet-handle { width: 34px; height: 4px; border-radius: 4px; background: #b9b8c1; margin: 0 auto 18px; }
.m3-sheet-heading { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 18px; }
.m3-sheet-heading h2 { font-size: 26px; margin: 0; }
.m3-eyebrow { color: var(--m3-primary); text-transform: uppercase; letter-spacing: .08em; font-size: 11px; font-weight: 700; }
.m3-icon-button,
.m3-onboarding-close {
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: var(--m3-surface-container-high);
  color: #33343e;
}
.m3-destination-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.m3-destination-grid button {
  min-height: 128px;
  border: 0;
  border-radius: 28px 14px 28px 14px;
  background: var(--m3-surface-container);
  text-align: left;
  padding: 18px;
  color: #252631;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  transition: transform .16s ease, background .16s ease;
}
.m3-destination-grid button:nth-child(2n) { border-radius: 14px 28px 14px 28px; }
.m3-destination-grid button:hover { transform: translateY(-2px); background: var(--m3-primary-container); }
.m3-destination-grid button > span { font-size: 25px; margin-bottom: auto; }
.m3-destination-grid b { font-size: 16px; }
.m3-destination-grid small { color: var(--muted); margin-top: 3px; }

.m3-onboarding-overlay { align-items: center; padding: 18px; }
.m3-onboarding {
  position: relative;
  width: min(500px, 100%);
  max-height: 92dvh;
  overflow: auto;
  padding: 28px;
  border-radius: 38px 18px 38px 18px;
  background: var(--m3-surface);
  box-shadow: 0 28px 80px rgba(14, 18, 46, .3);
  transform: scale(.96) translateY(12px);
  transition: transform .22s cubic-bezier(.2, .8, .2, 1);
}
.m3-onboarding-overlay.visible .m3-onboarding { transform: scale(1) translateY(0); }
.m3-onboarding-close { position: absolute; right: 18px; top: 18px; }
.m3-progress { display: flex; gap: 6px; padding-right: 55px; margin-bottom: 28px; }
.m3-progress span { height: 5px; flex: 1; border-radius: 6px; background: var(--m3-surface-container-high); }
.m3-progress span.active { background: var(--m3-primary); }
.m3-onboarding-icon {
  width: 76px;
  height: 76px;
  display: grid;
  place-items: center;
  border-radius: 26px 12px 26px 12px;
  background: var(--m3-primary-container);
  font-size: 34px;
  margin-bottom: 18px;
}
.m3-onboarding h2 { font-size: clamp(26px, 7vw, 36px); line-height: 1.05; letter-spacing: -.035em; margin: 6px 0 12px; }
.m3-onboarding-copy { color: var(--muted); font-size: 15px; margin: 0 0 22px; }
.m3-onboarding-body label { margin-top: 12px; }
.m3-primary-action,
.m3-text-action {
  width: 100%;
  min-height: 52px;
  border: 0;
  border-radius: 26px;
  font-weight: 700;
  margin-top: 16px;
}
.m3-primary-action { background: var(--m3-primary); color: var(--m3-on-primary); }
.m3-text-action { background: transparent; color: var(--m3-primary); margin-top: 5px; }
.m3-help { font-size: 12.5px; color: var(--muted); }
.m3-form-message { min-height: 20px; margin: 8px 0 0; }
.m3-success-panel,
.m3-info-panel {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 16px;
  border-radius: 22px;
  background: #dcf8e7;
  color: #103b22;
}
.m3-success-panel > span { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 50%; background: #fff; font-size: 20px; }
.m3-success-panel > div { display: flex; flex-direction: column; }
.m3-success-panel small { opacity: .72; }
.m3-info-panel { background: var(--m3-secondary-container); color: #2b2d43; }
.m3-command-label { margin: 0 0 8px; color: var(--muted); }
.m3-command {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border: 0;
  border-radius: 18px;
  background: var(--m3-primary-container);
  color: var(--m3-on-primary-container);
  padding: 16px;
}
.m3-command code { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.m3-command span { font-weight: 700; }

@media (max-width: 760px) {
  .m3-expressive .main { padding: 20px 16px 130px; }
  .m3-expressive .card { border-radius: 26px; padding: 19px; }
  .m3-expressive .bottom-nav {
    left: 12px;
    right: 12px;
    bottom: max(10px, env(safe-area-inset-bottom));
    height: 76px;
    padding: 8px 6px;
    border: 0;
    border-radius: 30px;
    background: rgba(240, 241, 249, .95);
    box-shadow: 0 12px 36px rgba(31, 39, 74, .18);
    backdrop-filter: blur(18px);
    overflow: hidden;
  }
  .m3-expressive .bottom-nav button {
    min-width: 0;
    border-radius: 22px;
    padding: 7px 2px 5px;
    font-size: 10px;
    transition: background .16s ease, transform .16s ease;
  }
  .m3-expressive .bottom-nav button.active { background: var(--m3-primary-container); color: var(--m3-on-primary-container); }
  .m3-expressive .bottom-nav button:active { transform: scale(.9); }
  .m3-nav-icon { font-size: 20px; line-height: 22px; }
  .m3-expressive .fab { right: 20px; bottom: 102px; height: 58px; min-width: 58px; padding: 0 17px; border-radius: 20px; }
  .m3-expressive .fab b { display: none; }
  .m3-api-banner { align-items: flex-start; flex-wrap: wrap; }
  .m3-api-banner .btn { margin-left: 58px; }
  .m3-destination-grid { grid-template-columns: 1fr 1fr; }
  .m3-destination-grid button { min-height: 118px; }
  .m3-onboarding { padding: 24px 20px; border-radius: 32px 16px 32px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  .m3-expressive *, .m3-expressive *::before, .m3-expressive *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}