/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; }

/* === CSS Variables === */
:root {
  --color-primary: #1a56db;
  --color-primary-hover: #1648b8;
  --color-primary-light: #e8f0fe;
  --color-bg: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-border: #e2e8f0;
  --color-text: #1e293b;
  --color-text-secondary: #4b5563;
  --color-text-muted: #6b7280;
  --color-danger: #dc2626;
  --color-danger-bg: #fef2f2;
  --color-warning: #d97706;
  --color-warning-bg: #fffbeb;
  --color-success: #16a34a;
  --color-success-bg: #f0fdf4;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.06);
  --radius: 8px;
  --radius-sm: 6px;
  --radius-lg: 12px;
}

/* === Base Typography === */
body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover { text-decoration: underline; }

strong { font-weight: 600; }

/* === Layout Utilities === */
.container {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container--narrow {
  max-width: 760px;
}

.section {
  padding: 5rem 0;
}

.section--sm {
  padding: 3rem 0;
}

/* === Navigation === */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--color-text);
  text-decoration: none;
}

.nav__logo:hover { text-decoration: none; }

.nav__logo-icon {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav__link {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color 0.15s;
}

.nav__link:hover {
  color: var(--color-text);
  text-decoration: none;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, color 0.15s, box-shadow 0.15s;
  white-space: nowrap;
}

.btn:hover { text-decoration: none; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

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

.btn--secondary {
  background: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--secondary:hover {
  background: var(--color-bg-secondary);
  border-color: #cbd5e1;
  color: var(--color-text);
}

.btn--danger {
  background: var(--color-danger);
  color: #fff;
  border-color: var(--color-danger);
}
.btn--danger:hover {
  background: #b91c1c;
  border-color: #b91c1c;
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}
.btn--ghost:hover {
  background: var(--color-bg-secondary);
  color: var(--color-text);
}

.btn--lg {
  padding: 0.875rem 2rem;
  font-size: 1.0625rem;
}

.btn--sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
}

/* === Cards === */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.card__subtitle {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* === Stat Cards === */
.stat-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.stat-card__label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.stat-card__value {
  font-size: 2rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--color-text);
  line-height: 1;
}

.stat-card__value--success { color: var(--color-success); }
.stat-card__value--danger { color: var(--color-danger); }

.stat-card__sub {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: 0.375rem;
}

/* === Tables === */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

thead {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--color-bg-secondary);
}

th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
}

tr:last-child td { border-bottom: none; }

tbody tr:nth-child(even) {
  background: var(--color-bg-secondary);
}

tbody tr:hover {
  background: var(--color-primary-light);
  cursor: pointer;
}

/* Flagged row states */
tr.flagged--danger {
  background: var(--color-danger-bg) !important;
}

tr.flagged--warning {
  background: var(--color-warning-bg) !important;
}

/* === Flag Badges === */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  letter-spacing: 0.02em;
}

.badge--danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border: 1px solid #fecaca;
}

.badge--warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid #fde68a;
}

.badge--success {
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid #bbf7d0;
}

.badge--neutral {
  background: #f1f5f9;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.badge--primary {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border: 1px solid #bfdbfe;
}

/* === Forms === */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 0.375rem;
}

.form-hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.form-input,
.form-select,
.form-textarea {
  display: block;
  width: 100%;
  padding: 0.625rem 0.875rem;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color 0.15s, box-shadow 0.15s;
  appearance: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-error {
  font-size: 0.8125rem;
  color: var(--color-danger);
  margin-top: 0.375rem;
}

/* === Upload Zone === */
.upload-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  background: var(--color-bg-secondary);
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.upload-zone__icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}

.upload-zone__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.375rem;
}

.upload-zone__sub {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: 0.75rem;
}

.upload-zone__hint {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* === Alert / Banner === */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  margin-bottom: 1rem;
}

.alert--danger {
  background: var(--color-danger-bg);
  border: 1px solid #fecaca;
  color: var(--color-danger);
}

.alert--warning {
  background: var(--color-warning-bg);
  border: 1px solid #fde68a;
  color: var(--color-warning);
}

.alert--success {
  background: var(--color-success-bg);
  border: 1px solid #bbf7d0;
  color: var(--color-success);
}

.alert--info {
  background: var(--color-primary-light);
  border: 1px solid #bfdbfe;
  color: var(--color-primary);
}

/* === Progress Bar === */
.progress {
  height: 8px;
  background: var(--color-border);
  border-radius: 999px;
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.progress__bar--warning { background: var(--color-warning); }
.progress__bar--danger { background: var(--color-danger); }
.progress__bar--success { background: var(--color-success); }

/* === Spinner === */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.spinner {
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
  display: inline-block;
}

.spinner--lg {
  width: 2.5rem;
  height: 2.5rem;
  border-width: 3px;
}

/* === Pricing Cards === */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  max-width: 700px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
}

.pricing-card--featured {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1), var(--shadow-md);
  position: relative;
}

.pricing-card__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.875rem;
  border-radius: 999px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.pricing-card__name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.pricing-card__price {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
  margin-bottom: 0.25rem;
}

.pricing-card__price span {
  font-size: 1rem;
  font-weight: 400;
  color: var(--color-text-muted);
}

.pricing-card__tagline {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.5rem;
}

.pricing-card__features {
  list-style: none;
  margin-bottom: 2rem;
}

.pricing-card__features li {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  padding: 0.375rem 0;
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

.pricing-card__features li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 0.05em;
}

/* === Step indicators (How it works) === */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
}

.step {
  text-align: center;
  padding: 1.5rem;
}

.step__number {
  width: 3rem;
  height: 3rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 auto 1rem;
}

.step__title {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.step__desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
}

/* === Pain Points Grid === */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.pain-item {
  padding: 1.5rem;
  background: var(--color-bg-secondary);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

.pain-item__icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.pain-item__title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.pain-item__desc {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* === Hero === */
.hero {
  padding: 5rem 0 4rem;
  text-align: center;
}

.hero__eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 0.375rem 0.875rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  color: var(--color-text);
}

.hero__title span { color: var(--color-danger); }

.hero__sub {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.hero__trust {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* === Trust Badges === */
.trust-badges {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.trust-badge__icon {
  color: var(--color-success);
  font-size: 1rem;
}

/* === Sample Report (demo table) === */
.sample-report {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  max-width: 860px;
  margin: 0 auto;
}

.sample-report__header {
  background: var(--color-bg-secondary);
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sample-report__title {
  font-weight: 700;
  font-size: 1rem;
}

.sample-report__summary {
  font-size: 0.875rem;
  color: var(--color-danger);
  font-weight: 600;
}

/* === Auth Form === */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-secondary);
  padding: 2rem;
}

.auth-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-md);
}

.auth-card__logo {
  text-align: center;
  margin-bottom: 1.75rem;
}

.auth-card__title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.375rem;
}

.auth-card__sub {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: 2rem;
}

.auth-divider {
  text-align: center;
  margin: 1.5rem 0;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* === Footer === */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 3rem 0 2rem;
  background: var(--color-bg-secondary);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.footer__brand p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  margin-top: 0.75rem;
  max-width: 280px;
}

.footer__col-title {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text);
  margin-bottom: 0.875rem;
}

.footer__links {
  list-style: none;
}

.footer__links li + li { margin-top: 0.5rem; }

.footer__links a {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  text-decoration: none;
}

.footer__links a:hover { color: var(--color-text); }

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  font-size: 0.875rem;
  color: var(--color-text-muted);
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* === Section headers === */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header__eyebrow {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.section-header__title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.section-header__sub {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* === Divider === */
.divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 2rem 0;
}

/* === Page header (internal pages) === */
.page-header {
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  padding: 2.5rem 0;
}

.page-header__title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.375rem;
}

.page-header__sub {
  font-size: 1rem;
  color: var(--color-text-secondary);
}

/* === Number formatting === */
.price {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
}

.price--danger { color: var(--color-danger); }
.price--success { color: var(--color-success); }
.price--muted { color: var(--color-text-muted); }

/* === Skeleton loading === */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton {
  background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

/* === Responsive === */
@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.5rem; }

  .container { padding: 0 1rem; }
  .section { padding: 3rem 0; }

  .nav__links { display: none; }

  .hero { padding: 3rem 0 2.5rem; }
  .hero__sub { font-size: 1rem; }

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

  .trust-badges {
    gap: 1rem;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 380px;
  }

  th, td {
    padding: 0.625rem 0.75rem;
    font-size: 0.875rem;
  }
}

@media (max-width: 480px) {
  .footer__grid {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
  }

  .pain-grid {
    grid-template-columns: 1fr;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__actions .btn {
    text-align: center;
    justify-content: center;
  }
}

/* === Print === */
@media print {
  .nav, .footer, .btn, .upload-zone { display: none !important; }
  body { font-size: 12px; }
  .card, .table-wrapper { box-shadow: none; border: 1px solid #ccc; }
}