:root {
  /* Identité "carnet de voyage" : vert émeraude (confiance, nature) +
     accent corail chaud (CTA, montants positifs) — pas de bleu "app pro"
     générique, l'app doit avoir une ambiance chaleureuse et légère. */
  --color-brand: #0e7c66;
  --color-brand-strong: #0b6353;
  --color-accent: #e8734a;
  --color-accent-strong: #c85a34;

  --radius-sm: 0.4rem;
  --radius-md: 0.7rem;
  --radius-pill: 999px;

  --color-ink: #16241f;
  --color-cloud: #f5f7f4;
  --color-white: #ffffff;
  --color-muted: #5c6d66;
  --color-border: #dbe4de;

  --color-danger: #dc2626;
  --color-danger-bg: #fef2f2;
  --color-success: #157a3b;
  --color-success-bg: #ecfdf3;
  --color-info-bg: #eef6f3;

  --color-balance-positive: #157a3b;
  --color-balance-negative: #c74b3f;

  --font-display: "Georgia", "Iowan Old Style", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, serif;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

:root[data-theme="dark"] {
  --color-cloud: #0c1613;
  --color-white: #131f1b;
  --color-ink: #e7f0ec;
  --color-muted: #93a69e;
  --color-border: #26362f;
  --color-brand: #2fbf9e;
  --color-brand-strong: #4fd4b6;
  --color-accent: #f0895f;
  --color-accent-strong: #f6a281;
  --color-danger: #f87171;
  --color-danger-bg: #2c1414;
  --color-success: #4ade80;
  --color-success-bg: #10261a;
  --color-info-bg: #10201c;
  --color-balance-positive: #4ade80;
  --color-balance-negative: #e0776a;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-cloud);
  color: var(--color-ink);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
a.link { color: var(--color-brand-strong); text-decoration: underline; }

*:focus-visible {
  outline: 2px solid var(--color-brand);
  outline-offset: 2px;
}

h1, h2, h3 { font-family: var(--font-display); line-height: 1.2; margin: 0 0 0.5rem; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.25rem; }
h3 { font-size: 1.05rem; }
p { margin: 0 0 0.75rem; line-height: 1.5; }

.muted { color: var(--color-muted); }
.small { font-size: 0.85rem; }

/* ------------------------------------------------------------------ */
/* Barre de navigation                                                 */
/* ------------------------------------------------------------------ */

.topbar {
  background: var(--color-brand);
  color: #fff;
  padding: env(safe-area-inset-top, 0) 0 0;
}

.topbar-inner {
  max-width: 64rem;
  margin: 0 auto;
  padding: 0.6rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: #fff;
  margin-right: auto;
}

.nav-menu { position: relative; }
.nav-toggle {
  list-style: none;
  cursor: pointer;
  font-size: 1.3rem;
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  user-select: none;
}
.nav-toggle::-webkit-details-marker { display: none; }
.nav-toggle:hover { background: rgba(255, 255, 255, 0.15); }

.nav-menu nav {
  position: absolute;
  top: calc(100% + 0.4rem);
  left: 0;
  background: var(--color-white);
  color: var(--color-ink);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.15);
  display: flex;
  flex-direction: column;
  min-width: 11rem;
  padding: 0.4rem;
  z-index: 20;
}

.nav-menu nav a {
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-sm);
}
.nav-menu nav a:hover { background: var(--color-cloud); }
.nav-menu nav a.active { color: var(--color-brand-strong); font-weight: 600; }

.theme-switch { background: none; border: none; cursor: pointer; padding: 0.2rem; }
.theme-switch-track {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-pill);
  padding: 0.25rem 0.4rem;
  position: relative;
}
.theme-switch-icon { font-size: 0.8rem; }

.account-slot { position: relative; }
.account-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  cursor: pointer;
}
.account-menu summary::-webkit-details-marker { display: none; }
.account-avatar { font-weight: 700; }
.account-menu-list {
  position: absolute;
  right: 0;
  top: calc(100% + 0.4rem);
  background: var(--color-white);
  color: var(--color-ink);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.15);
  min-width: 11rem;
  padding: 0.5rem;
  z-index: 20;
}
.account-menu-name { font-weight: 600; padding: 0.3rem 0.5rem; font-size: 0.85rem; color: var(--color-muted); }
.account-menu-list a { display: block; padding: 0.5rem; border-radius: var(--radius-sm); }
.account-menu-list a:hover { background: var(--color-cloud); }

.trip-subnav {
  background: var(--color-brand-strong);
  overflow-x: auto;
}
.trip-subnav-inner {
  max-width: 64rem;
  margin: 0 auto;
  display: flex;
  gap: 0.25rem;
  padding: 0 0.5rem;
}
.trip-subnav a {
  color: rgba(255, 255, 255, 0.8);
  padding: 0.6rem 0.75rem;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  font-size: 0.9rem;
}
.trip-subnav a.active {
  color: #fff;
  border-bottom-color: var(--color-accent);
  font-weight: 600;
}

/* ------------------------------------------------------------------ */
/* Mise en page générale                                               */
/* ------------------------------------------------------------------ */

.page {
  max-width: 64rem;
  margin: 0 auto;
  padding: 1.25rem 1rem 3rem;
}

.stack { display: flex; flex-direction: column; gap: 1rem; }
.stack-sm { display: flex; flex-direction: column; gap: 0.5rem; }
.row { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 0.6rem; flex-wrap: wrap; }

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 0.9rem;
}

.card-link {
  display: block;
  transition: box-shadow 0.15s, transform 0.15s;
}
.card-link:hover {
  box-shadow: 0 0.4rem 1rem rgba(0, 0, 0, 0.08);
  transform: translateY(-1px);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background: var(--color-info-bg);
  color: var(--color-brand-strong);
  border-radius: var(--radius-pill);
  padding: 0.15rem 0.6rem;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-past { background: var(--color-border); color: var(--color-muted); }

/* ------------------------------------------------------------------ */
/* Boutons                                                             */
/* ------------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-ink);
  border-radius: var(--radius-sm);
  padding: 0.55rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
}
.btn:hover { background: var(--color-cloud); }

.btn-primary {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: #fff;
}
.btn-primary:hover { background: var(--color-brand-strong); border-color: var(--color-brand-strong); }

.btn-accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}
.btn-accent:hover { background: var(--color-accent-strong); border-color: var(--color-accent-strong); }

.btn-danger { color: var(--color-danger); border-color: var(--color-danger); background: var(--color-white); }
.btn-danger:hover { background: var(--color-danger-bg); }

.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.82rem; }
.btn-icon { padding: 0.35rem 0.55rem; line-height: 1; }

/* ------------------------------------------------------------------ */
/* Formulaires                                                         */
/* ------------------------------------------------------------------ */

label { display: block; font-weight: 600; font-size: 0.85rem; margin-bottom: 0.3rem; }

.field { margin-bottom: 0.9rem; }
.field-hint { font-size: 0.78rem; color: var(--color-muted); margin-top: 0.25rem; }

input[type="text"], input[type="email"], input[type="date"], input[type="datetime-local"],
input[type="number"], input[type="password"], select, textarea {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-ink);
  font-size: 0.95rem;
  font-family: inherit;
}
textarea { resize: vertical; min-height: 4.5rem; }
input:focus, select:focus, textarea:focus { border-color: var(--color-brand); }

.checkbox-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 0.4rem 0.8rem;
  cursor: pointer;
  font-size: 0.88rem;
  background: var(--color-white);
}
.chip input { margin: 0; width: auto; }
.chip:has(input:checked) {
  background: var(--color-info-bg);
  border-color: var(--color-brand);
  color: var(--color-brand-strong);
  font-weight: 600;
}

form .actions { display: flex; gap: 0.6rem; margin-top: 1rem; flex-wrap: wrap; }

/* ------------------------------------------------------------------ */
/* Tableaux                                                            */
/* ------------------------------------------------------------------ */

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { text-align: left; padding: 0.55rem 0.6rem; border-bottom: 1px solid var(--color-border); }
th { color: var(--color-muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.02em; }
tr:last-child td { border-bottom: none; }

/* ------------------------------------------------------------------ */
/* Messages flash                                                      */
/* ------------------------------------------------------------------ */

.flash {
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.9rem;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}
.flash-success { background: var(--color-success-bg); color: var(--color-success); }
.flash-error { background: var(--color-danger-bg); color: var(--color-danger); }

.empty-state {
  text-align: center;
  color: var(--color-muted);
  padding: 2rem 1rem;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
}

/* ------------------------------------------------------------------ */
/* Tricount / soldes                                                   */
/* ------------------------------------------------------------------ */

.balance-positive { color: var(--color-balance-positive); font-weight: 700; }
.balance-negative { color: var(--color-balance-negative); font-weight: 700; }
.balance-zero { color: var(--color-muted); font-weight: 600; }

.settlement-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--color-border);
}
.settlement-row:last-child { border-bottom: none; }
.settlement-arrow { color: var(--color-accent); font-weight: 700; }

/* ------------------------------------------------------------------ */
/* Timeline itinéraire                                                 */
/* ------------------------------------------------------------------ */

.timeline { list-style: none; margin: 0; padding: 0; }
.timeline-item {
  position: relative;
  padding: 0 0 1.1rem 1.6rem;
  border-left: 2px solid var(--color-border);
  margin-left: 0.4rem;
}
.timeline-item:last-child { border-left-color: transparent; padding-bottom: 0; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -0.45rem;
  top: 0.2rem;
  width: 0.85rem;
  height: 0.85rem;
  border-radius: 50%;
  background: var(--color-brand);
  border: 2px solid var(--color-white);
}
.timeline-date { font-size: 0.78rem; color: var(--color-muted); text-transform: uppercase; letter-spacing: 0.03em; }

/* ------------------------------------------------------------------ */
/* Page de connexion                                                   */
/* ------------------------------------------------------------------ */

.auth-brand {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  text-align: center;
  color: var(--color-brand-strong);
  margin: 1rem 0 0.5rem;
}

.code-display {
  text-align: center;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  background: var(--color-info-bg);
  color: var(--color-brand-strong);
  border-radius: var(--radius-sm);
  padding: 0.6rem;
}

@media (min-width: 40rem) {
  .row-between h1 { margin-bottom: 0; }
}