/* ═══════════════════════════════════════════
   Youniforge Consulting — Site Styles
   ═══════════════════════════════════════════ */

/* ── Custom Properties ── */
:root {
  /* Palette */
  --color-primary: #4F46E5;
  --color-primary-dark: #3730A3;
  --color-primary-light: #818CF8;
  --color-accent: #F59E0B;
  --color-accent-light: #FCD34D;

  --color-slate-50: #F8FAFC;
  --color-slate-100: #F1F5F9;
  --color-slate-200: #E2E8F0;
  --color-slate-300: #CBD5E1;
  --color-slate-400: #94A3B8;
  --color-slate-500: #64748B;
  --color-slate-600: #475569;
  --color-slate-700: #334155;
  --color-slate-800: #1E293B;
  --color-slate-900: #0F172A;

  --color-white: #FFFFFF;
  --color-bg: var(--color-white);
  --color-bg-alt: var(--color-slate-50);

  /* Typography */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;

  /* Spacing */
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Layout */
  --max-width: 1120px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-slate-700);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul { list-style: none; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ── Container ── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (min-width: 768px) {
  .container { padding: 0 var(--space-8); }
}

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-sans); font-weight: 600; font-size: var(--text-sm);
  padding: 0.75rem 1.75rem; border-radius: var(--radius-md);
  border: 2px solid transparent; cursor: pointer;
  transition: all var(--transition-base); white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary); color: var(--color-white);
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-dark); border-color: var(--color-primary-dark);
  color: var(--color-white); transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
}

.btn-ghost {
  background: transparent; color: var(--color-primary);
  border-color: var(--color-slate-300);
}
.btn-ghost:hover {
  border-color: var(--color-primary); color: var(--color-primary-dark);
  transform: translateY(-1px);
}

.btn-sm { padding: 0.5rem 1.25rem; font-size: var(--text-xs); }
.btn-full { width: 100%; }

/* ── Section Label ── */
.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

/* ── Header / Nav ── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-slate-200);
}

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

.logo {
  font-size: var(--text-lg); font-weight: 700; color: var(--color-slate-800);
  display: flex; align-items: center; gap: 0.5rem;
}
.logo:hover { color: var(--color-primary-dark); }

.logo-icon {
  width: 28px; height: 28px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: inline-block; flex-shrink: 0;
}

.logo-accent { font-weight: 400; color: var(--color-slate-500); }

.nav-links { display: none; align-items: center; gap: var(--space-6); }
.nav-links a {
  font-size: var(--text-sm); font-weight: 500; color: var(--color-slate-600);
}
.nav-links a:hover { color: var(--color-primary); }

/* Mobile nav toggle */
.nav-toggle {
  display: flex; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-toggle span {
  width: 22px; height: 2px; background: var(--color-slate-700);
  border-radius: 2px; transition: all var(--transition-fast);
}

@media (min-width: 768px) {
  .nav-toggle { display: none; }
  .nav-links { display: flex; }
}

/* Mobile nav open state */
.nav-links.open {
  display: flex; flex-direction: column;
  position: absolute; top: 64px; left: 0; right: 0;
  background: var(--color-white); border-bottom: 1px solid var(--color-slate-200);
  padding: var(--space-4) var(--space-6); gap: var(--space-3);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}

/* ── Hero ── */
.hero {
  padding: var(--space-16) 0;
  background: linear-gradient(175deg, var(--color-slate-900) 0%, #1E1B4B 50%, var(--color-primary-dark) 100%);
  color: var(--color-white); text-align: center;
}

.hero-inner { max-width: 720px; }

.hero h1 {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-4xl));
  font-weight: 700; line-height: 1.2; margin-bottom: var(--space-6);
}

.hero p {
  font-size: var(--text-lg); color: rgba(255,255,255,0.8);
  max-width: 540px; margin: 0 auto var(--space-8); line-height: 1.7;
}

.hero-actions { display: flex; gap: var(--space-3); justify-content: center; flex-wrap: wrap; }
.hero .btn-primary { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-slate-900); }
.hero .btn-primary:hover { background: var(--color-accent-light); border-color: var(--color-accent-light); box-shadow: 0 4px 16px rgba(245,158,11,0.4); }
.hero .btn-ghost { color: var(--color-white); border-color: rgba(255,255,255,0.3); }
.hero .btn-ghost:hover { border-color: var(--color-white); color: var(--color-white); transform: translateY(-1px); }

/* ── Section Base ── */
.section { padding: var(--space-16) 0; }
.section-header { text-align: center; max-width: 580px; margin: 0 auto var(--space-12); }
.section-header h2 { font-size: var(--text-3xl); color: var(--color-slate-800); margin-bottom: var(--space-3); }
.section-header p { color: var(--color-slate-500); }

/* ── About ── */
.about { background: var(--color-bg-alt); }

.about-inner {
  display: grid; gap: var(--space-8);
}

@media (min-width: 768px) {
  .about-inner { grid-template-columns: 1fr 1fr; align-items: center; }
}

.about-text h2 { font-size: var(--text-3xl); color: var(--color-slate-800); margin-bottom: var(--space-4); line-height: 1.25; }
.about-text p { margin-bottom: var(--space-4); color: var(--color-slate-600); }

.about-stats { display: grid; gap: var(--space-3); }

.stat-card {
  background: var(--color-white); border-radius: var(--radius-md);
  padding: var(--space-6); text-align: center;
  border: 1px solid var(--color-slate-200);
}
.stat-number { display: block; font-size: var(--text-2xl); font-weight: 700; color: var(--color-primary); margin-bottom: 0.25rem; }
.stat-label { font-size: var(--text-sm); color: var(--color-slate-500); }

/* ── Services ── */
.services-grid { display: grid; gap: var(--space-6); }

@media (min-width: 480px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }

.service-card {
  background: var(--color-white); border-radius: var(--radius-lg);
  padding: var(--space-8); border: 1px solid var(--color-slate-200);
  transition: all var(--transition-base);
}
.service-card:hover {
  border-color: var(--color-primary-light); transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(79, 70, 229, 0.1);
}

.service-icon {
  width: 56px; height: 56px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(79,70,229,0.08), rgba(79,70,229,0.04));
  display: flex; align-items: center; justify-content: center;
  color: var(--color-primary); margin-bottom: var(--space-4);
}

.service-card h3 { font-size: var(--text-xl); color: var(--color-slate-800); margin-bottom: var(--space-3); }
.service-card p { color: var(--color-slate-500); line-height: 1.7; }

/* ── Process ── */
.process { background: var(--color-bg-alt); }

.process-steps { display: grid; gap: var(--space-6); }

@media (min-width: 768px) { .process-steps { grid-template-columns: repeat(4, 1fr); } }

.step { text-align: center; padding: var(--space-6); }
.step-number {
  display: inline-block; font-family: var(--font-mono);
  font-size: var(--text-sm); color: var(--color-primary); margin-bottom: var(--space-3);
}
.step h3 { font-size: var(--text-lg); color: var(--color-slate-800); margin-bottom: var(--space-2); }
.step p { font-size: var(--text-sm); color: var(--color-slate-500); line-height: 1.7; }

/* ── Contact ── */
.contact-inner { display: grid; gap: var(--space-10); }

@media (min-width: 768px) { .contact-inner { grid-template-columns: 1fr 1fr; align-items: start; } }

.contact-text h2 { font-size: var(--text-3xl); color: var(--color-slate-800); margin-bottom: var(--space-4); line-height: 1.25; }
.contact-text p { color: var(--color-slate-500); margin-bottom: var(--space-6); }

.contact-details li { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-3); }
.contact-details svg { color: var(--color-primary); flex-shrink: 0; }
.contact-details a { font-weight: 500; }

/* ── Form ── */
.contact-form { display: grid; gap: var(--space-4); }

.contact-form input,
.contact-form textarea {
  width: 100%; padding: 0.875rem 1rem; font-family: var(--font-sans);
  font-size: var(--text-sm); border: 1px solid var(--color-slate-300);
  border-radius: var(--radius-md); background: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  color: var(--color-slate-800);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--color-slate-400); }

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none; border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.15);
}

.contact-form textarea { resize: vertical; min-height: 120px; }

/* ── Footer ── */
.site-footer { padding: var(--space-8) 0; border-top: 1px solid var(--color-slate-200); background: var(--color-white); }
.footer-inner { text-align: center; }
.footer-inner p { font-size: var(--text-sm); color: var(--color-slate-500); }
.footer-tagline { margin-top: 0.25rem; font-size: var(--text-xs); color: var(--color-slate-400); }

/* ── Utility ── */
@media (max-width: 767px) {
  .section { padding: var(--space-12) 0; }
}

/* ═══════════════════════════════════════════
   Sub-page Styles — clients.html / experience.html
   ═══════════════════════════════════════════ */

/* ── Active nav link ── */
.nav-links a.active { color: var(--color-primary); font-weight: 600; }

/* ── Page Header (sub-pages) ── */
.page-header {
  padding: var(--space-12) 0 var(--space-8);
  background: linear-gradient(175deg, var(--color-slate-900) 0%, #1E1B4B 50%, var(--color-primary-dark) 100%);
  color: var(--color-white);
  text-align: center;
}

.page-header h1 {
  font-size: clamp(var(--text-3xl), 5vw, var(--text-4xl));
  font-weight: 700; margin-bottom: var(--space-3);
}

.page-header p {
  max-width: 560px; margin: 0 auto; color: rgba(255,255,255,0.8); line-height: 1.7;
}

/* ── Clients Grid ── */
.clients-grid { display: grid; gap: var(--space-6); }

@media (min-width: 480px) { .clients-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .clients-grid { grid-template-columns: repeat(3, 1fr); } }

.client-card {
  background: var(--color-white); border-radius: var(--radius-lg);
  padding: var(--space-8); border: 1px solid var(--color-slate-200);
  transition: all var(--transition-base);
}
.client-card:hover {
  border-color: var(--color-primary-light); transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(79, 70, 229, 0.1);
}

.client-card h3 { font-size: var(--text-lg); color: var(--color-slate-800); margin-bottom: 0.25rem; }

.client-domain {
  display: inline-block; font-family: var(--font-mono); font-size: var(--text-xs);
  color: var(--color-primary); letter-spacing: 0.04em; margin-bottom: var(--space-3);
}

.client-card p { font-size: var(--text-sm); color: var(--color-slate-500); line-height: 1.7; }

/* ── Tech Categories ── */
.tech-section { background: var(--color-bg-alt); }

.tech-categories { display: grid; gap: var(--space-8); }

@media (min-width: 768px) { .tech-categories { grid-template-columns: repeat(2, 1fr); } }

.tech-group h3 {
  font-size: var(--text-sm); font-weight: 600; color: var(--color-slate-700);
  margin-bottom: var(--space-3); text-transform: uppercase; letter-spacing: 0.06em;
}

.tech-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); }

.tag {
  font-family: var(--font-mono); font-size: var(--text-xs);
  padding: 0.35rem 0.75rem; border-radius: var(--radius-sm);
  background: rgba(79, 70, 229, 0.08); color: var(--color-primary);
  border: 1px solid rgba(79, 70, 229, 0.15);
}

/* ── Timeline ── */
.timeline { max-width: 720px; margin: 0 auto; position: relative; padding-left: var(--space-8); }

.timeline::before {
  content: ''; position: absolute; left: 13px; top: 0; bottom: 0;
  width: 2px; background: var(--color-slate-200);
}

.timeline-item { position: relative; padding-bottom: var(--space-8); }
.timeline-item:last-child { padding-bottom: 0; }

.timeline-marker {
  position: absolute; left: calc(-1 * var(--space-8) + 4px); top: 4px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--color-white); border: 3px solid var(--color-primary);
  z-index: 1;
}

.timeline-content { padding-left: var(--space-4); }

.timeline-date {
  font-family: var(--font-mono); font-size: var(--text-xs);
  color: var(--color-primary); letter-spacing: 0.04em; display: block; margin-bottom: 0.25rem;
}

.timeline-content h3 { font-size: var(--text-lg); color: var(--color-slate-800); margin-bottom: var(--space-2); line-height: 1.35; }
.timeline-content p { font-size: var(--text-sm); color: var(--color-slate-500); line-height: 1.7; }

/* ── Footer year fallback ── */
.footer-year { display: contents; }