/* ═══════════════════════════════════════════════════════════════════════
   base.css — Shared CSS foundation for all VRFTools pages

   Canonical definitions extracted from style.css (LEV Kit / Config Tools)
   and site.css (public site pages).  Loaded BEFORE both stylesheets so
   per‑section overrides still win via normal cascade.

   HC-03 step 1 (additive slice) — no existing CSS rules have been removed.
   ═══════════════════════════════════════════════════════════════════════ */

/* ── Design tokens ──────────────────────────────────────────────────── */
:root {
  --red:        #c0392b;   /* canonical red — replaces --danger and the former #cc0000 --red */
  --dark:       #1a1a1a;
  --gray:       #444;
  --light-gray: #f5f5f5;
  --border:     #ddd;
  --white:      #fff;
  --muted:      #666;
  --green:      #2e7d32;   /* unified — deeper, accessible shade       */
  --warn-bg:    #fff8e1;
  --warn-border:#f9a825;
}

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

/* ═══════════════════════════════════════════════════════════════════════
   SHARED COMPONENTS
   ═══════════════════════════════════════════════════════════════════════ */

/* ── Card ───────────────────────────────────────────────────────────── */
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
}
.card-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--gray);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
}

/* ── Buttons ────────────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: 9px 20px;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  text-decoration: none;
  transition: opacity 0.15s;
}
.btn:hover { opacity: 0.85; }
.btn-primary { background: var(--red); color: var(--white); }
.btn-outline {
  background: transparent;
  color: var(--dark);
  border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--gray); }

/* ── Drop zone ──────────────────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  color: var(--muted);
}
.drop-zone:hover,
.drop-zone.dragging {
  background: #fff3f3;
  border-color: var(--red);
  color: var(--dark);
}
.drop-zone.uploading {
  background: #f5f5f5;
  border-color: #bbb;
  cursor: wait;
}
.drop-zone .icon { font-size: 2.5rem; margin-bottom: 12px; }
.drop-zone p    { font-size: 0.95rem; }
.drop-zone small { font-size: 0.78rem; margin-top: 6px; display: block; }
.drop-zone:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--white), 0 0 0 5px var(--red);
}

/* ── Breadcrumb ─────────────────────────────────────────────────────── */
.breadcrumb {
  padding: 0.75rem 2rem;
  font-size: 0.875rem;
  color: var(--gray);
  border-bottom: 1px solid var(--border);
  background: #f9f9f9;
  flex-shrink: 0;
}
.breadcrumb a { color: var(--red); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

/* ── Page title / subtitle ──────────────────────────────────────────── */
.page-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 6px;
}
.page-subtitle {
  color: var(--muted);
  margin-bottom: 28px;
  font-size: 0.95rem;
}

/* ── Error / success messages ───────────────────────────────────────── */
.error-msg {
  background: #fdf0ef;
  border: 1px solid #e88;
  border-radius: 6px;
  padding: 12px 16px;
  color: var(--red);
  font-size: 0.9rem;
  margin-top: 12px;
  display: none;
}
.error-msg.visible { display: block; }

.success-msg {
  background: #f0fdf4;
  border: 1px solid #86efac;
  border-left: 4px solid var(--green);
  border-radius: 6px;
  padding: 16px;
  color: #166534;
  font-size: 0.9rem;
  display: none;
}
.success-msg.visible { display: block; }

/* ── Alerts ─────────────────────────────────────────────────────────── */
.alert {
  border-radius: 6px;
  padding: 12px 16px;
  font-size: 0.88rem;
  margin-top: 12px;
}
.alert-error { background: #fdecea; border: 1px solid #f5c6cb; color: #c0392b; }
.alert-warn  { background: var(--warn-bg); border: 1px solid var(--warn-border); color: #5a4000; }
.alert-info  { background: #e8f4fd; border: 1px solid #bee3f8; color: #1a5276; }

/* ── Badges ─────────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  background: #eee;
  color: var(--gray);
  border-radius: 4px;
  padding: 2px 8px;
  font-size: 0.78rem;
  font-family: monospace;
}
.badge-green { background: #e8f5e9; color: var(--green); }

.badge-pill {
  display: inline-block;
  background: #fff3f3;
  color: var(--red);
  border: 1px solid #ffb3b3;
  border-radius: 999px;
  padding: 0.2rem 0.8rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  align-self: flex-start;
}

/* ── Info popup overlay (deduplicated — shared by all pages) ────────── */
.info-popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: popupFadeIn 0.15s ease;
}
.info-popup {
  background: var(--white);
  border-radius: 12px;
  padding: 28px;
  max-width: 500px;
  width: 90%;
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}
.info-popup h3 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  color: var(--dark);
}
.info-popup .problem-label { font-weight: 600; color: var(--dark); }
.info-popup .solution-label { font-weight: 600; color: var(--red); }
.info-popup p {
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 10px;
}
.info-popup .close-popup {
  display: inline-block;
  margin-top: 12px;
  padding: 8px 20px;
  background: var(--dark);
  color: var(--white);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  font-family: inherit;
}

@keyframes popupFadeIn { from { opacity: 0; } to { opacity: 1; } }