/* ============================================================
   Insight — app layout
   Shell, top bar, navigation. No gradients, no blobs.
   ============================================================ */

.app {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  /* Subtle inner edge — paper feels. No gradient. */
  background: var(--paper);
}

/* Top bar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--s-3) var(--s-4);
  border-bottom: 1.5px solid var(--line);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  /* When .brand is a <button> (clickable home link), reset button styles. */
  background: none;
  border: 0;
  padding: 0;
  color: inherit;
  cursor: pointer;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: var(--coral);
  display: grid;
  place-items: center;
  font-size: 20px;
  box-shadow: var(--shadow-sm);
}

/* Language switch */
.lang-switch {
  display: inline-flex;
  background: var(--card);
  border: 1.5px solid var(--line);
  border-radius: 999px;
  padding: 3px;
}

.lang-switch button {
  padding: 6px 14px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--ink-mute);
  transition: all 0.2s ease;
  letter-spacing: 0.02em;
}

.lang-switch button.is-active {
  background: var(--ink);
  color: var(--paper);
}

/* Stage — where each screen renders. */
.stage {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: var(--s-4);
  padding-bottom: var(--s-7);
}

.stage-inner {
  width: 100%;
  max-width: 640px;
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}

/* Screen-level card. No entrance animation — flashing the screen
   on every state change feels busy. */
.screen {
  background: var(--card);
  border-radius: var(--r-xl);
  padding: var(--s-5) var(--s-4);
  box-shadow: var(--shadow-md);
  border: 1.5px solid var(--line);
}

.screen h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.6rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--s-1);
}

.screen .lede {
  color: var(--ink-soft);
  font-size: 0.95rem;
  margin-bottom: var(--s-5);
}

/* Sub-screen tag. */
.eyebrow {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--coral);
  margin-bottom: var(--s-2);
}

[dir="rtl"] .eyebrow { letter-spacing: 0; }

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  padding: 12px 18px;
  border-radius: var(--r-md);
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background-color 0.2s ease;
  white-space: nowrap;
  user-select: none;
}

.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: var(--ink);
  color: var(--paper);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover:not(:disabled) { background: var(--grape); }

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--line);
}
.btn-secondary:hover:not(:disabled) { background: var(--card-soft); }

.btn-coral { background: var(--coral); color: white; }
.btn-coral:hover:not(:disabled) { background: #ff5252; }

.btn-mint { background: var(--mint); color: var(--ink); }
.btn-mint:hover:not(:disabled) { background: #3ebdb4; }

.btn-sun { background: var(--sunshine); color: var(--ink); }
.btn-sun:hover:not(:disabled) { background: #f0b820; }

.btn-sky { background: var(--sky); color: white; }
.btn-sky:hover:not(:disabled) { background: #3d86f0; }

.btn-grape { background: var(--grape); color: white; }
.btn-grape:hover:not(:disabled) { background: #8a4dd4; }

.btn-leaf { background: var(--leaf); color: white; }
.btn-leaf:hover:not(:disabled) { background: #5ab868; }

.btn-good { background: var(--good); color: white; }
.btn-good:hover:not(:disabled) { background: #16a34a; }

.btn-bad { background: var(--bad); color: white; }
.btn-bad:hover:not(:disabled) { background: #dc2626; }

.btn-block { width: 100%; }
.btn-lg { padding: 16px 22px; font-size: 1.05rem; }

.btn-row {
  display: flex;
  gap: var(--s-2);
}
.btn-row > .btn { flex: 1; min-width: 0; }
.btn-row.tight { gap: var(--s-2); }
.btn-row.between { justify-content: space-between; }
.btn-row.wrap { flex-wrap: wrap; }

/* ============================================================
   Form controls
   ============================================================ */
.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-label {
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

[dir="rtl"] .field-label { letter-spacing: 0; }

.input, .select {
  background: var(--card-soft);
  border: 1.5px solid var(--line);
  border-radius: var(--r-md);
  padding: 12px 14px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  width: 100%;
}

.input:focus, .select:focus {
  outline: none;
  border-color: var(--grape);
  background: var(--card);
}

[dir="rtl"] .input,
[dir="rtl"] .select { text-align: right; }

/* ============================================================
   Top brand mark variants
   ============================================================ */
.brand-mark.coral { background: var(--coral); }
.brand-mark.sun   { background: var(--sunshine); }
.brand-mark.mint  { background: var(--mint); }
.brand-mark.sky   { background: var(--sky); }
.brand-mark.grape { background: var(--grape); }