/* ==========================================================================
   SEO Master AI — shared design system
   ========================================================================== */

:root {
  /* Brand */
  --brand-50: #f2f1ff;
  --brand-100: #e6e4ff;
  --brand-200: #cfcbff;
  --brand-300: #aca4ff;
  --brand-400: #8b7ffb;
  --brand-500: #6d5cf5;
  --brand-600: #5b3fea;
  --brand-700: #4c2fd1;
  --brand-800: #3f27a8;
  --brand-900: #352284;
  --brand-gradient: linear-gradient(135deg, #6d5cf5 0%, #8b3fea 55%, #d946a8 100%);

  /* Semantic */
  --success: #16a34a;
  --success-bg: #ecfdf3;
  --success-border: #a6f2c4;
  --warning: #b45309;
  --warning-bg: #fffbeb;
  --warning-border: #fde68a;
  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --danger-border: #fecaca;
  --info: #0369a1;
  --info-bg: #f0f9ff;
  --info-border: #bae6fd;

  /* Neutrals */
  --ink-900: #14121f;
  --ink-800: #211f33;
  --ink-700: #383554;
  --ink-600: #514e70;
  --ink-500: #6c6890;
  --ink-400: #8f8bb0;
  --ink-300: #bcb9d6;
  --ink-200: #dddaf0;
  --ink-100: #eeecfb;
  --ink-50: #f8f7fd;
  --white: #ffffff;

  /* Surfaces */
  --bg-page: #f7f6fc;
  --bg-card: #ffffff;
  --border-subtle: #e6e3f5;

  /* Elevation */
  --shadow-sm: 0 1px 2px rgba(20, 18, 31, 0.06);
  --shadow-md: 0 4px 16px rgba(30, 21, 71, 0.08);
  --shadow-lg: 0 12px 32px rgba(30, 21, 71, 0.12);
  --shadow-glow: 0 8px 24px rgba(109, 92, 245, 0.25);

  /* Shape */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-pill: 999px;

  /* Type */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* Motion */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: #100e1c;
    --bg-card: #17142a;
    --border-subtle: #2b2745;
    --ink-900: #f6f5fd;
    --ink-800: #e7e5f7;
    --ink-700: #cac6e6;
    --ink-600: #a7a2cc;
    --ink-500: #8a86ae;
    --ink-400: #726e93;
    --ink-100: #221e3a;
    --ink-50: #1b1830;
    --white: #17142a;
    --success-bg: #0f2a1c;
    --success-border: #1c5535;
    --warning-bg: #2c2109;
    --warning-border: #6b4c0d;
    --danger-bg: #2c1414;
    --danger-border: #6b2323;
    --info-bg: #0d2333;
    --info-border: #1c4e6e;
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.45);
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg-page);
  color: var(--ink-800);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 20px;
}
.container-narrow { max-width: 480px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1160px; margin: 0 auto; padding: 0 20px; }

h1, h2, h3, h4 { color: var(--ink-900); line-height: 1.25; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.7rem, 1.4rem + 1.2vw, 2.4rem); font-weight: 800; margin: 0 0 8px; }
h2 { font-size: 1.4rem; font-weight: 750; }
h3 { font-size: 1.1rem; font-weight: 700; }
p { color: var(--ink-600); }
a { color: var(--brand-600); text-decoration: none; }
a:hover { color: var(--brand-700); text-decoration: underline; }

.subtitle { color: var(--ink-500); font-size: 1.02rem; margin-top: 0; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 650;
  padding: 11px 20px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s var(--ease), box-shadow 0.15s var(--ease), background 0.15s var(--ease), border-color 0.15s var(--ease);
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: default; transform: none; }

.btn-primary {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { box-shadow: 0 10px 28px rgba(109, 92, 245, 0.38); color: #fff; transform: translateY(-1px); }

.btn-secondary {
  background: var(--bg-card);
  color: var(--ink-800);
  border-color: var(--border-subtle);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover { border-color: var(--brand-300); color: var(--brand-700); }

.btn-ghost { background: transparent; color: var(--ink-600); }
.btn-ghost:hover { background: var(--ink-50); color: var(--ink-900); }

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

.btn-sm { padding: 7px 14px; font-size: 0.82rem; border-radius: var(--radius-sm); }
.btn-block { width: 100%; }

/* ---- Inputs ---- */
.input, select.input, textarea.input {
  width: 100%;
  padding: 11px 14px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--ink-900);
  background: var(--bg-card);
  border: 1.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}
.input:focus, select.input:focus, textarea.input:focus {
  outline: none;
  border-color: var(--brand-400);
  box-shadow: 0 0 0 4px var(--brand-100);
}
.field-label { display: block; font-size: 0.8rem; font-weight: 650; color: var(--ink-700); margin: 16px 0 6px; }

/* ---- Cards ---- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}
.card-elevated { box-shadow: var(--shadow-md); }

/* ---- Badges ---- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.03em;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
}
.badge-pass, .badge.pass { background: var(--success-bg); color: var(--success); border: 1px solid var(--success-border); }
.badge-warn, .badge.warn { background: var(--warning-bg); color: var(--warning); border: 1px solid var(--warning-border); }
.badge-fail, .badge.fail { background: var(--danger-bg); color: var(--danger); border: 1px solid var(--danger-border); }
.badge-info { background: var(--info-bg); color: var(--info); border: 1px solid var(--info-border); }
.badge-brand { background: var(--brand-100); color: var(--brand-700); }

/* ---- Alerts / banners ---- */
.alert { border-radius: var(--radius-md); padding: 14px 16px; font-size: 0.88rem; border: 1px solid; }
.alert-info { background: var(--info-bg); border-color: var(--info-border); color: var(--info); }
.alert-success { background: var(--success-bg); border-color: var(--success-border); color: var(--success); }
.alert-warning { background: var(--warning-bg); border-color: var(--warning-border); color: var(--warning); }
.alert-danger { background: var(--danger-bg); border-color: var(--danger-border); color: var(--danger); }

/* ---- Nav bar ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: color-mix(in srgb, var(--bg-card) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-subtle);
}
.navbar-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 20px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.navbar-logo { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 1.05rem; color: var(--ink-900); }
.navbar-logo:hover { text-decoration: none; color: var(--ink-900); }
.navbar-logo .mark {
  width: 30px; height: 30px; border-radius: 9px;
  background: var(--brand-gradient);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 15px; font-weight: 800; flex-shrink: 0;
}
.navbar-links { display: flex; align-items: center; gap: 4px; flex: 1; overflow-x: auto; scrollbar-width: none; }
.navbar-links::-webkit-scrollbar { display: none; }
.navbar-links a {
  color: var(--ink-600); font-size: 0.85rem; font-weight: 600;
  padding: 8px 12px; border-radius: var(--radius-sm); white-space: nowrap;
}
.navbar-links a:hover { background: var(--ink-50); color: var(--ink-900); text-decoration: none; }
.navbar-user { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.navbar-plan { font-size: 0.72rem; font-weight: 700; padding: 4px 10px; border-radius: var(--radius-pill); background: var(--brand-100); color: var(--brand-700); white-space: nowrap; }

/* ---- Score displays ---- */
.score-ring {
  width: 96px; height: 96px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; font-weight: 800; color: #fff; flex-shrink: 0;
  box-shadow: var(--shadow-md);
  position: relative;
}
.score-ring::after {
  content: ""; position: absolute; inset: -5px; border-radius: 50%;
  border: 2px solid currentColor; opacity: 0.25;
}

/* ---- Category / stat grid ---- */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
.stat-card {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  background: var(--bg-card);
  transition: transform 0.15s var(--ease), box-shadow 0.15s var(--ease);
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.stat-card .label { font-size: 0.72rem; color: var(--ink-500); font-weight: 650; text-transform: uppercase; letter-spacing: 0.03em; }
.stat-card .value { font-size: 1.5rem; font-weight: 800; color: var(--ink-900); margin-top: 2px; }

/* ---- Check rows (analyzer output) ---- */
.check-row {
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--ink-300);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-bottom: 8px;
  background: var(--bg-card);
}
.check-row.pass { border-left-color: var(--success); }
.check-row.warn { border-left-color: var(--warning); }
.check-row.fail { border-left-color: var(--danger); }
.check-row h4 { margin: 0 0 4px; font-size: 0.9rem; color: var(--ink-900); display: flex; align-items: center; gap: 8px; }
.check-row p { margin: 2px 0 0; font-size: 0.83rem; color: var(--ink-600); }

.category-section { margin-bottom: 22px; }
.category-section h3 { font-size: 0.95rem; margin: 0 0 10px; padding-bottom: 8px; border-bottom: 1px solid var(--border-subtle); }

/* ---- Tables ---- */
table.data-table { border-collapse: collapse; width: 100%; font-size: 0.86rem; }
table.data-table th { text-align: left; color: var(--ink-500); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.03em; padding: 8px 10px; border-bottom: 1px solid var(--border-subtle); }
table.data-table td { padding: 10px; border-bottom: 1px solid var(--border-subtle); color: var(--ink-700); }
table.data-table tr:last-child td { border-bottom: none; }

/* ---- Utility ---- */
.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; } .gap-24 { gap: 24px; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; } .mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; }
.text-muted { color: var(--ink-500); }
.text-sm { font-size: 0.85rem; }
.text-center { text-align: center; }
.pill { border-radius: var(--radius-pill); }
.fade-in { animation: fadeIn 0.35s var(--ease); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.page-section { padding: 40px 0; }
.footer-links { text-align: center; font-size: 0.82rem; color: var(--ink-500); margin-top: 40px; padding: 24px 0 40px; }
.footer-links a { color: var(--ink-500); }

@media (max-width: 640px) {
  .navbar-links { display: none; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}