/* ============================================
   AI Ranking Consultants — Design System
   Bold "AI-futuristic" theme: violet + amber on near-black.
   Single source of truth for all public-facing pages.
   Reskinned 2026-06-12 (was Stripe/Linear blue).
   ============================================ */

/* --- Tokens --- */
:root {
  /* Colors */
  --color-white: #ffffff;
  --color-bg: #ffffff;
  --color-bg-subtle: #f7f5fb;     /* faint violet-tinted paper */
  --color-bg-muted: #efe9fb;
  --color-border: #e7e2f2;
  --color-border-strong: #cfc6e6;

  --color-text: #14101f;          /* near-black ink, violet-leaning */
  --color-text-secondary: #4b455c;
  --color-text-muted: #8b8499;

  --color-primary: #7c3aed;       /* violet-600 */
  --color-primary-hover: #6d28d9; /* violet-700 */
  --color-primary-2: #a855f7;     /* purple-500, for gradients */
  --color-primary-light: #f4f0fe;
  --color-primary-border: #ddd6fe;

  --color-accent: #f59e0b;        /* amber — pops & secondary CTAs */
  --color-accent-2: #fb923c;      /* orange for accent gradients */
  --color-success: #16a34a;
  --color-warning: #f59e0b;
  --color-danger: #e11d48;        /* rose, not red-blue */

  /* Dark band */
  --color-ink-deep: #0d0a18;
  --color-ink-deep-2: #1a1130;
  --grad-primary: linear-gradient(135deg, #7c3aed 0%, #a855f7 55%, #c026d3 100%);
  --grad-accent: linear-gradient(135deg, #f59e0b 0%, #fb923c 100%);
  --glow: 0 12px 40px -8px rgba(124, 58, 237, 0.45);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.8125rem;
  --text-base: 0.9375rem;
  --text-lg: 1.0625rem;
  --text-xl: 1.1875rem;
  --text-2xl: 1.4375rem;
  --text-3xl: 1.8125rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3.25rem;

  --leading-tight: 1.08;
  --leading-snug: 1.3;
  --leading-normal: 1.5;

  --tracking-tight: -0.03em;
  --tracking-normal: 0;

  /* Spacing (tightened — less scroll) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 1.4rem;
  --space-10: 1.5rem;
  --space-12: 1.75rem;
  --space-14: 1.9rem;
  --space-16: 2rem;
  --space-20: 2.4rem;
  --space-24: 2.8rem;

  /* Radius */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(20, 16, 31, 0.06);
  --shadow-sm: 0 1px 3px rgba(20, 16, 31, 0.10), 0 1px 2px rgba(20, 16, 31, 0.05);
  --shadow: 0 6px 16px -4px rgba(20, 16, 31, 0.12);
  --shadow-md: 0 12px 28px -6px rgba(20, 16, 31, 0.16);
  --shadow-lg: 0 24px 48px -12px rgba(20, 16, 31, 0.22);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition: 200ms ease;
  --transition-slow: 300ms ease;

  /* Layout */
  --container-max: 1140px;
  --container-narrow: 760px;
}

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

html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: optimizeLegibility; scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background: var(--color-bg);
}

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary-hover); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

/* --- Layout --- */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-5); }
.container-narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 var(--space-5); }

/* --- Navbar --- */
.navbar {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border);
}
.navbar-inner { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-5); height: 58px; display: flex; align-items: center; justify-content: space-between; }
.navbar-brand { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 800; color: var(--color-text); text-decoration: none; letter-spacing: var(--tracking-tight); display: flex; align-items: center; gap: var(--space-2); }
.navbar-brand:hover { color: var(--color-text); }
.navbar-brand .brand-mark {
  width: 28px; height: 28px; background: var(--grad-primary);
  border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 800; font-size: var(--text-sm); box-shadow: var(--glow);
}
.navbar-nav { display: flex; align-items: center; gap: var(--space-1); }
.navbar-nav a { padding: var(--space-2) var(--space-3); font-size: var(--text-sm); font-weight: 600; color: var(--color-text-secondary); border-radius: var(--radius); transition: all var(--transition-fast); }
.navbar-nav a:hover, .navbar-nav a.active { color: var(--color-primary); background: var(--color-primary-light); }
.navbar-actions { display: flex; align-items: center; gap: var(--space-3); }

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); font-weight: 800; color: var(--color-text); line-height: var(--leading-tight); letter-spacing: var(--tracking-tight); }

.text-5xl { font-size: var(--text-5xl); } .text-4xl { font-size: var(--text-4xl); } .text-3xl { font-size: var(--text-3xl); }
.text-2xl { font-size: var(--text-2xl); } .text-xl { font-size: var(--text-xl); } .text-lg { font-size: var(--text-lg); }
.text-base { font-size: var(--text-base); } .text-sm { font-size: var(--text-sm); } .text-xs { font-size: var(--text-xs); }
.text-secondary { color: var(--color-text-secondary); } .text-muted { color: var(--color-text-muted); } .text-primary { color: var(--color-primary); }
.font-medium { font-weight: 500; } .font-semibold { font-weight: 600; } .font-bold { font-weight: 700; } .font-black { font-weight: 900; }
.leading-snug { line-height: var(--leading-snug); } .leading-normal { line-height: var(--leading-normal); }
.text-center { text-align: center; }
.text-gradient { background: var(--grad-primary); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-5); font-family: var(--font-sans); font-size: var(--text-sm);
  font-weight: 700; line-height: 1; border: 1px solid transparent; border-radius: var(--radius);
  cursor: pointer; transition: all var(--transition); text-decoration: none; white-space: nowrap;
}
.btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.btn-primary { background: var(--grad-primary); color: var(--color-white); border-color: transparent; box-shadow: var(--shadow-sm); }
.btn-primary:hover { color: var(--color-white); transform: translateY(-2px); box-shadow: var(--glow); }
.btn-accent { background: var(--grad-accent); color: #1a1003; border-color: transparent; box-shadow: var(--shadow-sm); }
.btn-accent:hover { color: #1a1003; transform: translateY(-2px); box-shadow: 0 12px 32px -8px rgba(245,158,11,0.5); }
.btn-secondary { background: var(--color-white); color: var(--color-text); border-color: var(--color-border-strong); }
.btn-secondary:hover { background: var(--color-primary-light); border-color: var(--color-primary-border); color: var(--color-primary); }
.btn-ghost { background: transparent; color: var(--color-text-secondary); border-color: transparent; }
.btn-ghost:hover { background: var(--color-bg-subtle); color: var(--color-text); }
.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); border-radius: var(--radius); }
.btn-sm { padding: var(--space-2) var(--space-3); font-size: var(--text-xs); }
.btn-full { width: 100%; }

/* --- Cards --- */
.card { background: var(--color-white); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-6); box-shadow: var(--shadow-xs); }
.card-elevated { box-shadow: var(--shadow-md); border-color: transparent; }
.card-interactive { transition: all var(--transition); }
.card-interactive:hover { box-shadow: var(--shadow-md); border-color: var(--color-primary-border); transform: translateY(-3px); }

/* --- Section --- */
.section { padding: var(--space-8) 0 var(--space-6); }
.section-alt { background: var(--color-bg-subtle); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.section-dark { background: radial-gradient(120% 120% at 50% 0%, #2a1758 0%, var(--color-ink-deep-2) 45%, var(--color-ink-deep) 100%); color: rgba(255,255,255,0.82); }
.section-dark h1, .section-dark h2, .section-dark h3 { color: #fff; }
.section-dark p { color: rgba(255,255,255,0.7); }
.section-label {
  display: inline-block; padding: var(--space-1) var(--space-3);
  background: var(--color-primary-light); color: var(--color-primary);
  border: 1px solid var(--color-primary-border); border-radius: var(--radius-full);
  font-size: var(--text-xs); font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em;
  margin-bottom: var(--space-4);
}
.section-dark .section-label { background: rgba(168,85,247,0.18); color: #d8b4fe; border-color: rgba(168,85,247,0.35); }

/* --- Forms --- */
.form-group { margin-bottom: var(--space-4); }
.form-label { display: block; font-size: var(--text-sm); font-weight: 600; color: var(--color-text); margin-bottom: var(--space-2); }
.form-input { width: 100%; padding: var(--space-3) var(--space-4); font-family: var(--font-sans); font-size: var(--text-base); color: var(--color-text); background: var(--color-white); border: 1px solid var(--color-border-strong); border-radius: var(--radius); transition: all var(--transition-fast); }
.form-input::placeholder { color: var(--color-text-muted); }
.form-input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15); }
.form-input-lg { padding: var(--space-4) var(--space-5); font-size: var(--text-lg); }
.form-hint { margin-top: var(--space-2); font-size: var(--text-sm); color: var(--color-text-muted); line-height: var(--leading-normal); }
select.form-input { appearance: none; background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%238b8499' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right var(--space-4) center; padding-right: var(--space-10); }
textarea.form-input { resize: vertical; min-height: 100px; }

/* --- Badges --- */
.badge { display: inline-flex; align-items: center; padding: var(--space-1) var(--space-3); font-size: var(--text-xs); font-weight: 700; border-radius: var(--radius-full); line-height: 1.4; }
.badge-primary { background: var(--color-primary-light); color: var(--color-primary); }
.badge-success { background: #f0fdf4; color: var(--color-success); }
.badge-warning { background: #fffbeb; color: var(--color-warning); }
.badge-danger { background: #fff1f2; color: var(--color-danger); }
.badge-neutral { background: var(--color-bg-muted); color: var(--color-text-secondary); }

/* --- Divider --- */
.divider { border: none; border-top: 1px solid var(--color-border); margin: var(--space-6) 0; }

/* --- Feature Grid --- */
.feature-grid { display: grid; grid-template-columns: repeat(1, 1fr); gap: var(--space-5); }
@media (min-width: 640px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .feature-grid { grid-template-columns: repeat(3, 1fr); } }
.feature-icon { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; background: var(--color-primary-light); color: var(--color-primary); border-radius: var(--radius); font-size: var(--text-lg); margin-bottom: var(--space-3); }

/* --- Footer --- */
.site-footer { background: var(--color-ink-deep); color: rgba(255, 255, 255, 0.7); padding: var(--space-14) 0 var(--space-6); }
.footer-grid { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-5); display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--space-10); }
.footer-col h4 { color: var(--color-white); font-size: var(--text-sm); font-weight: 700; margin-bottom: var(--space-3); text-transform: uppercase; letter-spacing: 0.05em; }
.footer-col p, .footer-col a { font-size: var(--text-sm); line-height: var(--leading-normal); color: rgba(255, 255, 255, 0.6); text-decoration: none; }
.footer-col a:hover { color: var(--color-white); }
.footer-links a { display: block; margin-bottom: var(--space-2); }
.footer-bottom { max-width: var(--container-max); margin: 0 auto; padding: var(--space-6) var(--space-5) 0; margin-top: var(--space-10); border-top: 1px solid rgba(255, 255, 255, 0.1); text-align: center; font-size: var(--text-xs); color: rgba(255, 255, 255, 0.4); }
.footer-bottom a { color: rgba(255, 255, 255, 0.4); margin: 0 var(--space-2); }
.footer-bottom a:hover { color: rgba(255, 255, 255, 0.7); }

/* --- Contact toggle (footer) --- */
.contact-toggle { cursor: pointer; font-weight: 600; color: rgba(255, 255, 255, 0.6); font-size: var(--text-sm); }
.contact-toggle::before { content: "\25B8  "; }
.contact-toggle.active::before { content: "\25BE  "; }
.contact-toggle:hover { color: var(--color-white); }
.contact-form-wrapper { display: none; margin-top: var(--space-4); }
.contact-form { background: rgba(255, 255, 255, 0.06); padding: var(--space-5); border-radius: var(--radius); border: 1px solid rgba(255, 255, 255, 0.1); }
.contact-form label { display: block; font-size: var(--text-xs); margin-top: var(--space-3); margin-bottom: var(--space-1); color: rgba(255, 255, 255, 0.7); }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; padding: var(--space-2); border-radius: var(--radius-sm); border: 1px solid rgba(255, 255, 255, 0.15); background: rgba(255, 255, 255, 0.08); color: var(--color-white); font-size: var(--text-sm); font-family: var(--font-sans); }
.contact-form select option { background: #fff; color: #111; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { outline: none; border-color: var(--color-primary); }
.contact-form textarea { resize: vertical; min-height: 70px; }
.contact-form button { margin-top: var(--space-4); padding: var(--space-3) var(--space-4); background: var(--grad-primary); color: var(--color-white); border: none; border-radius: var(--radius-sm); cursor: pointer; font-size: var(--text-sm); font-weight: 700; font-family: var(--font-sans); transition: all var(--transition-fast); }
.contact-form button:hover { transform: translateY(-1px); box-shadow: var(--glow); }

/* --- Utility --- */
.mx-auto { margin-left: auto; margin-right: auto; }
.mt-2 { margin-top: var(--space-2); } .mt-4 { margin-top: var(--space-4); } .mt-6 { margin-top: var(--space-6); } .mt-8 { margin-top: var(--space-8); }
.mb-2 { margin-bottom: var(--space-2); } .mb-4 { margin-bottom: var(--space-4); } .mb-6 { margin-bottom: var(--space-6); } .mb-8 { margin-bottom: var(--space-8); }
.max-w-narrow { max-width: var(--container-narrow); } .max-w-lg { max-width: 640px; } .max-w-md { max-width: 480px; }

/* --- Mobile Menu --- */
.mobile-menu-btn { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 32px; height: 32px; background: none; border: none; cursor: pointer; padding: 4px; }
.mobile-menu-btn span { display: block; width: 100%; height: 2px; background: var(--color-text); border-radius: 2px; transition: all var(--transition-fast); }
.nav-open .mobile-menu-btn span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-open .mobile-menu-btn span:nth-child(2) { opacity: 0; }
.nav-open .mobile-menu-btn span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Responsive --- */
@media (max-width: 768px) {
  :root { --text-5xl: 2.4rem; --text-4xl: 1.9rem; --text-3xl: 1.6rem; }
  .container, .container-narrow { padding: 0 var(--space-4); }
  .section { padding: var(--space-6) 0 var(--space-5); }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .navbar-inner { flex-wrap: wrap; }
  .navbar-nav, .navbar-actions { display: none; }
  .nav-open .navbar-nav, .nav-open .navbar-actions { display: flex; flex-direction: column; width: 100%; padding-top: var(--space-3); gap: 0; }
  .nav-open .navbar-nav { border-top: 1px solid var(--color-border); padding-top: var(--space-2); }
  .nav-open .navbar-nav a { padding: var(--space-3) 0; border-bottom: 1px solid var(--color-border); border-radius: 0; }
  .nav-open .navbar-actions { padding-bottom: var(--space-3); }
  .nav-open .navbar-actions .btn { width: 100%; justify-content: center; }
  .nav-open .navbar-inner { height: auto; padding-bottom: 0; }
  .mobile-menu-btn { display: flex; }
}
@media (min-width: 769px) { .mobile-menu-btn { display: none; } }