:root {
  /* Light, crisp palette */
  --bg-dark: #0f172a;                 /* retained for dark elements if needed */
  --bg: #f9fafb;                      /* light page background */
  --text: #111827;                    /* slate-900 */
  --text-muted: #6b7280;              /* slate-500 */
  --text-light: #6b7280;              /* for subtle secondary copy */
  --brand: #3b82f6;                   /* blue-500 */
  --primary: #3b82f6;                 /* blue-500 */
  --primary-600: #2563eb;             /* blue-600 */
  --primary-700: #1d4ed8;             /* blue-700 */
  --primary-800: #1e40af;             /* blue-800 */
  --accent: #0ea5e9;                  /* sky-500 */
  --panel: #ffffff;
  --panel-border: #e5e7eb;            /* crisp lines */
  --hover-bg: #eef2ff;                /* very light indigo */
  --hover-text: #1f2937;              /* slate-800 */
  --ring: rgba(37,99,235,0.28);
  --nav-bg: #ffffff;                  /* light nav */
  --nav-border: #e5e7eb;
}

/* Global font + base */
html, body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

/* Site-wide top navigation */
.site-nav {
  background: var(--nav-bg);
  color: var(--text);
  padding: 14px 20px;
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--nav-border);
}
.site-nav .nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
}
.site-nav .brand {
  color: var(--primary-700);
  font-weight: 700;
  letter-spacing: 0.3px;
  text-decoration: none;
}
.site-nav a {
  color: var(--text);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 8px;
  font-weight: 500;
}
.site-nav a:hover {
  background: var(--hover-bg);
  color: var(--text);
}
.dropdown { position: relative; display: inline-block; }
.dropdown-toggle { cursor: pointer; }
.dropdown-menu {
  display: none;
  position: absolute;
  top: 40px; left: 0;
  background: #ffffff;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  padding: 8px;
  min-width: 240px;
  box-shadow: 0 10px 24px rgba(15,23,42,0.08);
}
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a {
  display: block;
  padding: 10px 12px;
  color: var(--text);
  text-decoration: none;
  border-radius: 8px;
}
.dropdown-menu a:hover {
  background: #f3f4f6;
  color: var(--primary-700);
}

/* Layout helpers */
.container { max-width: 1200px; margin: 0 auto; padding: 20px; }

/* Page header */
.page-header {
  background: #ffffff;
  color: var(--text);
  padding: 40px 20px;
  text-align: center;
  border-radius: 12px;
  margin: 20px 0 30px;
  border: 1px solid var(--panel-border);
  box-shadow: 0 8px 20px rgba(2,8,23,0.04);
}
.page-header h1 { font-size: 2.2em; margin: 0 0 8px; }
.page-header p { opacity: 0.85; font-size: 1.05em; }

/* Footer */
.site-footer {
  text-align: center;
  color: var(--text-muted);
  padding: 30px 20px;
  margin-top: 50px;
  border-top: 1px solid #e5e7eb;
}

/* Link accents */
.link-primary { color: var(--primary-700); text-decoration: none; }
.link-primary:hover { color: var(--primary); text-decoration: underline; }

/* Cards / sections */
.card, .section {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  box-shadow: 0 6px 16px rgba(2, 8, 23, 0.04);
}

/* Buttons */
button, .button, .btn, .generate-btn {
  appearance: none;
  background: var(--primary);
  border: 1px solid var(--primary-600);
  color: #fff;
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 600;
  letter-spacing: 0.2px;
  cursor: pointer;
  transition: transform .06s ease, box-shadow .15s ease, background .15s ease;
  box-shadow: 0 6px 14px rgba(37,99,235,0.20);
}
button:hover, .button:hover, .btn:hover, .generate-btn:hover {
  background: var(--primary-700);
  transform: translateY(-1px);
  box-shadow: 0 10px 20px rgba(29,78,216,0.22);
}
button:active, .button:active, .btn:active, .generate-btn:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(29,78,216,0.2); }
button:disabled, .button:disabled, .btn:disabled, .generate-btn:disabled { opacity: 0.7; cursor: not-allowed; transform: none; box-shadow: none; }

.btn-ghost {
  background: transparent;
  color: var(--primary-700);
  border: 1px solid var(--panel-border);
}
.btn-ghost:hover { background: var(--hover-bg); color: #0b1220; }

/* Inputs */
input[type="text"], input[type="email"], input[type="number"], input[type="date"], select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  outline: none;
  background: #fff;
  color: var(--text);
  transition: box-shadow .15s ease, border-color .15s ease;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--primary-600);
  box-shadow: 0 0 0 4px var(--ring);
}

label { color: var(--text-muted); font-weight: 600; margin-bottom: 6px; display: inline-block; }

/* Utility */
.muted { color: var(--text-muted); }
.grid { display: grid; gap: 16px; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.tag { display: inline-block; padding: 4px 10px; border: 1px solid var(--panel-border); border-radius: 999px; background: #f0f6ff; color: var(--primary-700); font-weight: 600; }

/* Generic .nav fallback (for pages not using .site-nav) */
.nav { background: #ffffff; color: var(--text); padding: 14px 20px; border-bottom: 1px solid var(--panel-border); }
.nav a { color: var(--text); text-decoration: none; padding: 8px 12px; border-radius: 8px; }
.nav a:hover { background: #f3f4f6; color: var(--primary-700); }