/* ── Brand tokens ─────────────────────────────────────────────────────── */
:root {
  /* Header / footer */
  --color-brand-bg:        #1a2e4a;
  --color-brand-text:      #ffffff;
  --color-brand-muted:     rgba(255,255,255,0.55);
  --color-brand-border:    rgba(255,255,255,0.12);

  /* Accent (buttons, focus rings, active states) */
  --color-accent:          #6366f1;
  --color-accent-hover:    #4f46e5;
  --color-accent-light:    #eef2ff;
  --color-accent-disabled: #a5b4fc;

  /* Page */
  --color-bg:              #f1f5f9;
  --color-card-bg:         #ffffff;

  /* Text */
  --color-text:            #1e293b;
  --color-text-heading:    #0f172a;
  --color-text-muted:      #64748b;
  --color-text-label:      #374151;

  /* Borders & inputs */
  --color-border:          #e2e8f0;
  --color-border-input:    #cbd5e1;

  /* Status messages */
  --color-info-bg:         #eff6ff;
  --color-info-border:     #bfdbfe;
  --color-info-text:       #1d4ed8;
  --color-success-bg:      #f0fdf4;
  --color-success-border:  #bbf7d0;
  --color-success-text:    #15803d;
  --color-error-bg:        #fef2f2;
  --color-error-border:    #fecaca;
  --color-error-text:      #dc2626;

  /* Expert badge */
  --color-expert-bg:       #fef3c7;
  --color-expert-text:     #92400e;
  --color-expert-border:   #fde68a;
}

/* ── Reset ───────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Site header ─────────────────────────────────────────────────────── */
.site-header {
  background: var(--color-brand-bg);
  color: var(--color-brand-text);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  border-bottom: 1px solid var(--color-brand-border);
  flex-shrink: 0;
}

.site-header-left {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
}

.site-logo {
  height: 32px;
  width: auto;
  display: block;
}

.site-header-divider {
  width: 1px;
  height: 24px;
  background: var(--color-brand-border);
}

.site-header-subtitle {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-brand-muted);
  letter-spacing: 0.02em;
}

.site-header-right a {
  font-size: 0.8rem;
  color: var(--color-brand-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.site-header-right a:hover { color: var(--color-brand-text); }

/* ── Beta banner ─────────────────────────────────────────────────────── */
.beta-banner {
  background: var(--color-error-bg);
  border-bottom: 1px solid var(--color-error-border);
  color: var(--color-error-text);
  text-align: center;
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
}

/* ── Main content ────────────────────────────────────────────────────── */
.site-main {
  flex: 1;
  padding: 2.5rem 1rem;
}

.page {
  max-width: 680px;
  margin: 0 auto;
}

.page-header {
  margin-bottom: 2rem;
}

.page-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-heading);
}

.page-header p {
  margin-top: 0.4rem;
  color: var(--color-text-muted);
  font-size: 0.92rem;
}

/* ── Cards ───────────────────────────────────────────────────────────── */
.card {
  background: var(--color-card-bg);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  padding: 1.75rem;
  margin-bottom: 1.25rem;
}

.card-title {
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-text-muted);
  margin-bottom: 1.1rem;
}

/* ── Form elements ───────────────────────────────────────────────────── */
.field { margin-bottom: 1rem; }
.field:last-child { margin-bottom: 0; }

label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: var(--color-text-label);
}

label .hint {
  font-weight: 400;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  margin-left: 0.3rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="url"],
select {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--color-border-input);
  border-radius: 7px;
  font-size: 0.875rem;
  color: var(--color-text);
  background: var(--color-card-bg);
  transition: border-color 0.15s, box-shadow 0.15s;
  outline: none;
}

input:focus, select:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 15%, transparent);
}

input[type="file"] {
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 1px dashed var(--color-border-input);
  border-radius: 7px;
  font-size: 0.875rem;
  background: var(--color-bg);
  cursor: pointer;
}

.toggle-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
}

.toggle-btn {
  flex: 1;
  padding: 0.45rem;
  border: 1px solid var(--color-border-input);
  border-radius: 6px;
  background: var(--color-bg);
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.15s;
}

.toggle-btn.active {
  background: var(--color-accent-light);
  border-color: var(--color-accent);
  color: var(--color-accent-hover);
}

.row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.row-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1rem;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-label);
  cursor: pointer;
}

.checkbox-row input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--color-accent);
  cursor: pointer;
}

.checkboxes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.divider {
  height: 1px;
  background: var(--color-border);
  margin: 1rem 0;
}

/* ── Tooltips ────────────────────────────────────────────────────────── */
.tooltip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.65rem;
  font-weight: 700;
  font-style: normal;
  cursor: default;
  position: relative;
  margin-left: 0.3rem;
  vertical-align: middle;
  flex-shrink: 0;
  transition: background 0.15s, color 0.15s;
}

.tooltip-icon:hover {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

/* tooltip box */
.tooltip-icon::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-text-heading);
  color: #fff;
  padding: 0.5rem 0.7rem;
  border-radius: 6px;
  font-size: 0.775rem;
  font-weight: 400;
  line-height: 1.45;
  white-space: normal;
  width: 210px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 200;
  text-transform: none;
  letter-spacing: normal;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* downward-pointing arrow connecting box to icon */
.tooltip-icon::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%);
  border: 4px solid transparent;
  border-top-color: var(--color-text-heading);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 200;
}

.tooltip-icon:hover::after,
.tooltip-icon:hover::before { opacity: 1; }

/* ── Submit button ───────────────────────────────────────────────────── */
.submit-btn {
  width: 100%;
  padding: 0.8rem;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
  margin-top: 0.5rem;
}

.submit-btn:hover { background: var(--color-accent-hover); }
.submit-btn:disabled { background: var(--color-accent-disabled); cursor: not-allowed; }

/* ── Status messages ─────────────────────────────────────────────────── */
.status-box {
  display: none;
  padding: 0.9rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  margin-top: 1rem;
}

.status-box.info {
  background: var(--color-info-bg);
  border: 1px solid var(--color-info-border);
  color: var(--color-info-text);
}

.status-box.success {
  background: var(--color-success-bg);
  border: 1px solid var(--color-success-border);
  color: var(--color-success-text);
}

.status-box.error {
  background: var(--color-error-bg);
  border: 1px solid var(--color-error-border);
  color: var(--color-error-text);
}

/* ── Expert section ──────────────────────────────────────────────────── */
.expert-card {
  background: var(--color-card-bg);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  margin-bottom: 1.25rem;
}

.expert-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.75rem;
  cursor: pointer;
  user-select: none;
  transition: background 0.15s;
  border-radius: 12px;
}

/* flatten bottom corners when body is expanded */
.expert-card:has(.expert-body.open) .expert-header {
  border-radius: 12px 12px 0 0;
}

.expert-header:hover { background: var(--color-bg); }

.expert-header-left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.expert-badge {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  background: var(--color-expert-bg);
  color: var(--color-expert-text);
  border: 1px solid var(--color-expert-border);
  border-radius: 4px;
  padding: 0.15rem 0.45rem;
}

.expert-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-label);
}

.expert-chevron {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  transition: transform 0.2s;
}

.expert-chevron.open { transform: rotate(-90deg); }

.expert-body {
  display: none;
  border-top: 1px solid var(--color-border);
}

.expert-body.open {
  display: flex;
  flex-direction: column;
}

.expert-section {
  padding: 1.25rem 1.75rem;
}

.expert-section + .expert-section {
  border-top: 1px solid var(--color-border);
}

.expert-section-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.expert-section-fields {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* reset individual margins — gap handles all spacing inside expert sections */
.expert-section-fields > * { margin-bottom: 0; }

/* ── Site footer ─────────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-brand-bg);
  color: var(--color-brand-muted);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
  border-top: 1px solid var(--color-brand-border);
  flex-shrink: 0;
}

.site-footer a {
  color: var(--color-brand-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.site-footer a:hover { color: var(--color-brand-text); }

.site-footer-links {
  display: flex;
  gap: 1.25rem;
}