/* ============================================================
   md2pdf — Shared Styles
   Color palette: slate dark + blue accent
   ============================================================ */

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

:root {
  --bg-body: #0f172a;
  --bg-card: #1e293b;
  --bg-input: #0f172a;
  --bg-input-hover: #162036;
  --border: #334155;
  --border-focus: #3b82f6;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --accent-glow: rgba(59, 130, 246, 0.25);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --danger: #ef4444;
  --success: #22c55e;
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 180ms ease;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

/* ---- Layout ---- */

.page-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px 16px;
}

.page-footer {
  margin-top: 32px;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

/* ---- Card ---- */

.card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.35),
    0 0 0 1px rgba(255, 255, 255, 0.03);
}

.main-card {
  max-width: 500px;
}

/* ---- Brand (login) ---- */

.brand {
  text-align: center;
  margin-bottom: 32px;
}

.brand-icon {
  margin-bottom: 14px;
}

.brand-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.brand-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ---- Header (main page) ---- */

.app-header {
  width: 100%;
  max-width: 500px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ---- Card heading ---- */

.card-heading {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.card-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.5;
}

.card-description code {
  background: var(--bg-input);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.8rem;
  color: var(--accent);
  font-family: 'Cascadia Code', 'Fira Code', 'Consolas', monospace;
}

/* ---- Form elements ---- */

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
  outline: none;
}

input[type="text"]:hover,
input[type="password"]:hover {
  background: var(--bg-input-hover);
}

input[type="text"]:focus,
input[type="password"]:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

input::placeholder {
  color: var(--text-muted);
}

/* ---- File input ---- */

.file-input-wrapper {
  position: relative;
}

.file-input-wrapper input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  z-index: 2;
}

.file-input-display {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-input);
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
  cursor: pointer;
}

.file-input-wrapper:hover .file-input-display,
.file-input-wrapper input[type="file"]:focus + .file-input-display {
  border-color: var(--accent);
  color: var(--text-secondary);
  background: var(--bg-input-hover);
}

.file-input-display.has-file {
  border-color: var(--success);
  color: var(--success);
  border-style: solid;
}

/* ---- Select ---- */

.select-wrapper {
  position: relative;
}

.select-wrapper select {
  width: 100%;
  padding: 12px 40px 12px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.select-wrapper select:hover {
  background: var(--bg-input-hover);
}

.select-wrapper select:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.select-wrapper select option {
  background: var(--bg-card);
  color: var(--text-primary);
}

.select-arrow {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* ---- Buttons ---- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--transition), box-shadow var(--transition), transform 80ms ease;
  outline: none;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn-primary:focus-visible {
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-block {
  width: 100%;
  margin-top: 8px;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 8px 14px;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border-color: var(--text-muted);
}

/* ---- Error message ---- */

.error-msg {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
  font-size: 0.85rem;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  text-align: center;
}

/* ---- Message area (success / error) ---- */

.message-area {
  font-size: 0.85rem;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  text-align: center;
}

.message-area.is-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.message-area.is-success {
  background: rgba(34, 197, 94, 0.1);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #86efac;
}

/* ---- Spinner overlay ---- */

.spinner-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(4px);
}

.spinner-overlay[hidden] {
  display: none;
}

.spinner-container {
  text-align: center;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 16px;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.spinner-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

/* ---- Responsive ---- */

@media (max-width: 540px) {
  .card {
    padding: 28px 20px;
    border-radius: 8px;
  }

  .app-header {
    padding-left: 4px;
    padding-right: 4px;
  }

  .brand-title {
    font-size: 1.5rem;
  }

  .btn {
    padding: 12px 16px;
    font-size: 0.9rem;
  }
}

@media (max-width: 360px) {
  .card {
    padding: 24px 16px;
  }
}