/* Fourth Expedition — page-level components built on the MARSWELL design system */

:root {
  /* Legacy competency aliases used by the existing pages */
  --calcul: var(--nombres);
  --tables: var(--grandeurs);
  --fractions: var(--problemes);
  --geometrie: var(--espace);

  /* Legacy semantic aliases */
  --mars: oklch(0.72 0.17 45);
  --green: #34d399;
  --red: #fb7185;
  --blue: #60a5fa;
  --panel: oklch(0.2 0.04 268);
  --panel2: oklch(0.25 0.05 268);
  --muted: var(--muted-foreground);
  --gold: #fbbf24;
}

/* ──────────────────────────────────────────────────────────────────────────
   PAGE SHELL
   ────────────────────────────────────────────────────────────────────────── */
.page {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  padding: 1.25rem 1rem 4rem;
}

.page-wide {
  max-width: 1100px;
}

.wrap {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  padding: 1.25rem 1rem 4rem;
}

/* ──────────────────────────────────────────────────────────────────────────
   NAVIGATION
   ────────────────────────────────────────────────────────────────────────── */
.nav {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.brand > div:last-child > div {
  line-height: 1.1;
}

.brand small {
  display: block;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted-foreground);
}

.logo {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 6px 18px -4px rgba(249, 115, 22, 0.35);
}

.spacer { flex: 1 1 0%; }

.nav-links {
  display: flex;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.nav-links a,
.nav-links span {
  color: var(--muted-foreground);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.375rem 0.625rem;
  border-radius: var(--radius-md);
  transition: background-color var(--duration-micro), color var(--duration-micro);
}

.nav-links a:hover {
  background: var(--secondary);
  color: var(--foreground);
  text-decoration: none;
}

.lang {
  display: inline-flex;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.lang button,
.lang a,
.lang span {
  background: none;
  border: 0;
  color: var(--muted-foreground);
  padding: 0.375rem 0.625rem;
  font-weight: 700;
  cursor: pointer;
  font-size: 0.75rem;
  text-decoration: none;
  transition: background-color var(--duration-micro), color var(--duration-micro);
}

.lang .on {
  background: var(--primary);
  color: var(--primary-foreground);
}

/* ──────────────────────────────────────────────────────────────────────────
   CARDS
   ────────────────────────────────────────────────────────────────────────── */
.card {
  background: var(--card-bg-elevated);
  border: 1px solid var(--card-border-elevated);
  border-radius: var(--card-radius);
  backdrop-filter: blur(var(--card-blur)) saturate(1.3);
  box-shadow: var(--card-shadow-elevated);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card-light {
  background: var(--card-bg-elevated);
  border: 1px solid var(--card-border-elevated);
  border-radius: var(--card-radius);
  backdrop-filter: blur(var(--card-blur)) saturate(1.3);
  box-shadow: var(--card-shadow-elevated);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  color: var(--foreground);
}

/* ──────────────────────────────────────────────────────────────────────────
   TYPOGRAPHY HELPERS
   ────────────────────────────────────────────────────────────────────────── */
.center { text-align: center; }

.muted { color: var(--muted-foreground); }
.small { font-size: 0.875rem; }

/* ──────────────────────────────────────────────────────────────────────────
   BUTTONS (page-wide full-width defaults)
   ────────────────────────────────────────────────────────────────────────── */
.btn {
  width: 100%;
  height: 2.75rem;
  font-weight: 600;
}

.btn-sm {
  width: auto;
  height: 2rem;
  padding: 0 1rem;
  font-size: 0.75rem;
}

.btn-google {
  background: #fff;
  color: #1f2937;
  border-color: rgba(0, 0, 0, 0.08);
}

.btn-google:hover {
  background: #f9fafb;
}

/* ──────────────────────────────────────────────────────────────────────────
   FORMS
   ────────────────────────────────────────────────────────────────────────── */
.form-group {
  margin-bottom: 1rem;
}

.form-group label,
label.block {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--muted-foreground);
  margin-bottom: 0.375rem;
}

input:not(.input),
select,
textarea {
  width: 100%;
  height: 2.75rem;
  padding: 0 0.875rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--input);
  background: var(--input);
  color: var(--foreground);
  font-size: 0.875rem;
  outline: none;
  transition: border-color var(--duration-micro), box-shadow var(--duration-micro);
}

input:not(.input):focus,
select:focus,
textarea:focus {
  border-color: var(--ring);
  box-shadow: 0 0 0 2px color-mix(in oklab, var(--ring) 30%, transparent);
}

input::placeholder,
select::placeholder,
textarea::placeholder {
  color: var(--muted-foreground);
}

.card-light input:not(.input),
.card-light select,
.card-light textarea {
  background: rgba(255, 255, 255, 0.06);
}

/* ──────────────────────────────────────────────────────────────────────────
   LAYOUT GRIDS
   ────────────────────────────────────────────────────────────────────────── */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}

/* ──────────────────────────────────────────────────────────────────────────
   HERO / LANDING
   ────────────────────────────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 3rem 1rem 3.5rem;
}

.hero h1 {
  font-size: 2.25rem;
  line-height: 1.1;
  margin-bottom: 0.75rem;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p {
  font-size: 1.125rem;
  color: var(--muted-foreground);
  max-width: 34rem;
  margin: 0 auto 1.5rem;
  line-height: 1.6;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.feature {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  padding: 1.25rem;
  transition: transform var(--duration-micro), box-shadow var(--duration-micro), border-color var(--duration-micro);
}

.feature:hover {
  transform: translateY(var(--lift-y));
  box-shadow: var(--shadow-lift);
  border-color: var(--card-border-elevated);
}

.feature .icon {
  font-size: 2rem;
  margin-bottom: 0.625rem;
}

.feature h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.375rem;
}

.feature p {
  color: var(--muted-foreground);
  font-size: 0.875rem;
  line-height: 1.5;
}

/* ──────────────────────────────────────────────────────────────────────────
   AUTH
   ────────────────────────────────────────────────────────────────────────── */
.auth-shell {
  position: relative;
  z-index: 10;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.auth-card {
  width: 100%;
  max-width: 26rem;
}

/* ──────────────────────────────────────────────────────────────────────────
   PROFILES
   ────────────────────────────────────────────────────────────────────────── */
.profile-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  width: 100%;
  background: var(--card-bg-elevated);
  border: 1px solid var(--card-border-elevated);
  border-radius: var(--card-radius);
  padding: 1rem;
  text-align: left;
  color: var(--foreground);
  cursor: pointer;
  transition: transform var(--duration-micro), box-shadow var(--duration-micro), border-color var(--duration-micro);
}

.profile-card:hover {
  transform: translateY(var(--lift-y));
  box-shadow: var(--shadow-lift);
  border-color: var(--ring);
}

.avatar {
  font-size: 2.25rem;
  line-height: 1;
}

/* ──────────────────────────────────────────────────────────────────────────
   HUD / MISSION
   ────────────────────────────────────────────────────────────────────────── */
.hud {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 1rem;
  align-items: center;
  background: var(--card-bg-elevated);
  border: 1px solid var(--card-border-elevated);
  border-radius: var(--card-radius);
  backdrop-filter: blur(var(--card-blur)) saturate(1.3);
  box-shadow: var(--card-shadow-elevated);
  padding: 1rem;
  margin-bottom: 1rem;
}

.ring {
  position: relative;
  width: 78px;
  height: 78px;
}

.ring svg {
  transform: rotate(-90deg);
}

.ring .val {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  text-align: center;
}

.ring .val strong {
  display: block;
  font-size: 1.25rem;
  line-height: 1;
}

.ring .val span {
  font-size: 0.625rem;
  color: var(--muted-foreground);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hud-mid { min-width: 0; }

.hud-mid h2 {
  margin: 0 0 0.25rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.pills {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.pill {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 0.25rem 0.625rem;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.hud-right {
  text-align: right;
  font-size: 0.75rem;
  color: var(--muted-foreground);
}

.hud-right strong {
  display: block;
  color: var(--foreground);
  font-size: 1.125rem;
  font-weight: 700;
}

/* ──────────────────────────────────────────────────────────────────────────
   QUESTION CARD
   ────────────────────────────────────────────────────────────────────────── */
.question-card {
  background: var(--card-bg-elevated);
  border: 1px solid var(--card-border-elevated);
  border-radius: var(--card-radius);
  backdrop-filter: blur(var(--card-blur)) saturate(1.3);
  box-shadow: var(--card-shadow-elevated);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.q-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted-foreground);
}

.competency-calcul { color: var(--calcul); }
.competency-tables { color: var(--tables); }
.competency-fractions { color: var(--fractions); }
.competency-geometrie { color: var(--geometrie); }

.prompt {
  font-size: 1.35rem;
  font-weight: 600;
  margin: 0 0 1.25rem;
  line-height: 1.35;
}

.options {
  display: grid;
  gap: 0.625rem;
}

.option {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 0.875rem 1rem;
  text-align: left;
  color: var(--foreground);
  font-size: 0.9375rem;
  font-weight: 500;
  cursor: pointer;
  transition: transform var(--duration-micro), border-color var(--duration-micro), box-shadow var(--duration-micro);
}

.option:hover {
  border-color: var(--ring);
  transform: translateY(var(--lift-y));
  box-shadow: var(--shadow-lift);
}

.feedback {
  border-radius: var(--radius-md);
  padding: 0.875rem 1rem;
  margin-top: 1rem;
  font-size: 0.875rem;
}

.feedback.correct {
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.4);
  color: var(--green);
}

.feedback.wrong {
  background: rgba(251, 113, 133, 0.12);
  border: 1px solid rgba(251, 113, 133, 0.4);
  color: var(--red);
}

/* ──────────────────────────────────────────────────────────────────────────
   STATS / PROGRESS
   ────────────────────────────────────────────────────────────────────────── */
.stat {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
}

.stat .value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--foreground);
}

.stat .label {
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted-foreground);
  margin-top: 0.25rem;
}

.progress {
  height: 0.5rem;
  background: var(--card-bg);
  border-radius: 999px;
  overflow: hidden;
}

.progress > div {
  height: 100%;
  background: var(--primary);
  border-radius: 999px;
}

/* ──────────────────────────────────────────────────────────────────────────
   TABLES
   ────────────────────────────────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

th, td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--card-border);
}

th {
  color: var(--muted-foreground);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 700;
}

/* ──────────────────────────────────────────────────────────────────────────
   FOOTER
   ────────────────────────────────────────────────────────────────────────── */
.footer {
  text-align: center;
  color: var(--muted-foreground);
  font-size: 0.75rem;
  margin-top: 3rem;
  padding-bottom: 1.5rem;
}

/* ──────────────────────────────────────────────────────────────────────────
   RESPONSIVE
   ────────────────────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .hud { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  .ring { display: none; }
  .hud-right { text-align: left; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero h1 { font-size: 1.75rem; }
  .feature-grid { grid-template-columns: 1fr; }
}