/* Ernest Serunkuma Portfolio — Pure HTML/CSS */

/* ===================== 1. RESET & BASE ===================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  font-size: 16px;
}
@media (max-width: 767px) { html { scroll-padding-top: var(--nav-height-mobile); } }
body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-on-surface-now);
  background-color: var(--color-surface-now);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button {
  font-family: inherit; font-size: inherit; border: none; background: none; cursor: pointer;
}

/* Dark mode token overrides */
@media (prefers-color-scheme: dark) {
  :root {
    --color-surface-now:          var(--color-surface-dark);
    --color-surface-alt-now:      var(--color-surface-alt-dark);
    --color-on-surface-now:       var(--color-on-surface-dark);
    --color-on-surface-muted-now: var(--color-on-surface-muted-dark);
    --color-border-now:           var(--color-border-dark);
  }
}

/* ===================== 2. UTILITIES ===================== */
.container {
  width: 100%; max-width: var(--container-max); margin: 0 auto;
  padding: 0 var(--container-padding);
}
.section-padding { padding: var(--space-24) 0; }
@media (max-width: 767px) { .section-padding { padding: var(--space-16) 0; } }
.text-center { text-align: center; }
.display-font { font-family: var(--font-display); }
.mono-font    { font-family: var(--font-mono); }
.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;
}

/* Skip link */
.skip-link {
  position: absolute; top: -100%; left: var(--space-4); z-index: var(--z-top);
  background: var(--color-ink); color: var(--color-surface); padding: var(--space-3) var(--space-4);
  border-radius: 4px; font-size: var(--text-sm); font-weight: 500;
  transition: top var(--transition-fast) ease;
}
.skip-link:focus { top: var(--space-2); }

/* Focus */
:focus-visible {
  outline: 2px solid var(--color-primary); outline-offset: 2px;
}

/* ===================== 3. TYPOGRAPHY HELPERS ===================== */
.h1 { font-size: var(--text-hero); line-height: 1.1; font-family: var(--font-display); font-weight: 700; color: var(--color-ink); }
.h2 { font-size: var(--text-3xl); line-height: 1.25; font-family: var(--font-display); font-weight: 700; color: var(--color-ink); }
.h3 { font-size: var(--text-xl);  line-height: 1.3;  font-family: var(--font-display); font-weight: 600; color: var(--color-ink); }
@media (min-width: 768px) {
  .h2 { font-size: var(--text-4xl); }
  .h3 { font-size: var(--text-2xl); }
}
.lead { font-size: var(--text-lg); line-height: 1.6; color: var(--color-on-surface-muted-now); }
.small { font-size: var(--text-sm); color: var(--color-on-surface-muted-now); }

/* ===================== 4. BUTTONS ===================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  padding: var(--space-3) var(--space-6); border-radius: 9999px;
  font-size: var(--text-sm); font-weight: 600;
  min-height: 44px; min-width: 44px;
  transition: transform var(--transition-fast) var(--ease-out),
              box-shadow var(--transition-fast) var(--ease-out),
              background-color var(--transition-fast) ease;
}
.btn-primary {
  background-color: var(--color-primary); color: var(--color-ink);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(217,154,33,0.35);
}
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: transparent; color: var(--color-on-surface-now);
  border: 1.5px solid var(--color-border-now);
}
.btn-secondary:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-ghost {
  background: transparent; color: var(--color-on-surface-muted-now);
  padding: var(--space-2) 0; border-radius: 0; font-weight: 500;
  border-bottom: 1px solid transparent;
}
.btn-ghost:hover { color: var(--color-primary); border-bottom-color: var(--color-primary); }

@keyframes cta-glow {
  0%, 100% { box-shadow: 0 2px 12px rgba(217,154,33,0.25); }
  50%      { box-shadow: 0 4px 24px rgba(217,154,33,0.45); }
}
@media (prefers-reduced-motion: no-preference) {
  .btn-cta-pulse { animation: cta-glow 3s ease-in-out infinite; }
}

/* ===================== 5. TAGS & SECTION HEADER ===================== */
.tag {
  display: inline-block; padding: var(--space-1) var(--space-3); border-radius: 4px;
  font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 500;
  letter-spacing: 0.02em; background-color: var(--color-primary-light); color: var(--color-ink);
  white-space: nowrap;
}
@media (prefers-color-scheme: dark) {
  .tag { background-color: rgba(217,154,33,0.15); color: var(--color-primary); }
}

.section-header { max-width: 720px; margin-bottom: var(--space-12); }
.section-header .section-label {
  font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase;
  letter-spacing: 0.1em; color: var(--color-primary); margin-bottom: var(--space-3); display: block;
}
.section-header .h2 { margin-bottom: var(--space-4); }
.section-header .lead { max-width: 600px; }

/* ===================== 6. NAVIGATION ===================== */
.site-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: var(--z-nav);
  height: var(--nav-height-mobile); background: transparent;
  transition: background-color var(--transition-medium) ease,
              backdrop-filter var(--transition-medium) ease,
              box-shadow var(--transition-medium) ease;
}
@media (min-width: 768px) { .site-nav { height: var(--nav-height); } }
.site-nav.is-scrolled {
  background-color: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border-now);
}
@media (prefers-color-scheme: dark) {
  .site-nav.is-scrolled { background-color: rgba(17,17,17,0.9); }
}

.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }

/* Logo */
.nav-logo {
  display: inline-flex; align-items: center; gap: var(--space-3);
  min-height: 44px; min-width: 44px;
}
.nav-logo-mark {
  width: 36px; height: 36px; border-radius: 8px;
  background-color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: var(--text-sm); font-weight: 700;
  color: var(--color-ink); flex-shrink: 0;
}
.nav-logo-text {
  font-family: var(--font-display); font-size: var(--text-base); font-weight: 600;
  color: var(--color-ink); display: none;
}
@media (min-width: 640px) { .nav-logo-text { display: block; } }

/* Desktop links */
.nav-links { display: none; align-items: center; gap: var(--space-6); }
@media (min-width: 768px) { .nav-links { display: flex; } }

.nav-link {
  position: relative; font-size: var(--text-sm); font-weight: 500;
  color: var(--color-on-surface-now); padding: var(--space-2) 0;
  min-height: 44px; min-width: 44px; display: inline-flex; align-items: center;
  transition: color var(--transition-fast) ease;
}
.nav-link:hover { color: var(--color-primary); }
.nav-link.is-active { color: var(--color-primary); }
.nav-link.is-active::before {
  content: ''; position: absolute; left: -10px; top: 50%; transform: translateY(-50%);
  width: 3px; height: 16px; border-radius: 2px; background-color: var(--color-primary);
}

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

/* Hamburger */
.nav-toggle {
  display: flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; padding: var(--space-2); border-radius: 8px;
  color: var(--color-ink);
}
@media (min-width: 768px) { .nav-toggle { display: none; } }

.hamburger-icon {
  width: 24px; height: 18px; position: relative;
  display: flex; flex-direction: column; justify-content: space-between;
}
.hamburger-icon span {
  display: block; width: 100%; height: 2px; background-color: var(--color-ink);
  border-radius: 2px;
  transition: transform var(--transition-base) var(--ease-out), opacity var(--transition-base) ease;
}
.nav-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .hamburger-icon span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* Mobile overlay */
.mobile-nav {
  position: fixed; inset: 0; z-index: var(--z-modal);
  background-color: var(--color-overlay);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: var(--space-6);
  opacity: 0; visibility: hidden;
  transition: opacity var(--transition-medium) ease, visibility var(--transition-medium) ease;
}
.mobile-nav.is-open { opacity: 1; visibility: visible; }
.mobile-nav-link {
  font-family: var(--font-display); font-size: var(--text-3xl); font-weight: 600;
  color: var(--color-surface); padding: var(--space-2) var(--space-4);
  min-height: 44px; min-width: 44px; display: inline-flex; align-items: center;
  transition: color var(--transition-fast) ease;
}
.mobile-nav-link:hover, .mobile-nav-link.is-active { color: var(--color-primary); }
.mobile-nav .btn-primary { margin-top: var(--space-4); font-size: var(--text-base); padding: var(--space-4) var(--space-8); }
.mobile-nav-close {
  position: absolute; top: var(--space-4); right: var(--space-4);
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  color: var(--color-surface);
}
.mobile-nav-close svg { width: 24px; height: 24px; }

/* ===================== 7. HERO ===================== */
.hero {
  min-height: 100dvh; display: flex; align-items: center;
  padding-top: var(--nav-height-mobile); position: relative; overflow: hidden;
}
@media (min-width: 768px) {
  .hero { min-height: 100vh; padding-top: var(--nav-height); }
}
.hero-inner {
  display: grid; grid-template-columns: 1fr; gap: var(--space-10); align-items: center;
}
@media (min-width: 1024px) {
  .hero-inner { grid-template-columns: 1.2fr 0.8fr; gap: var(--space-16); }
}
.hero-content { max-width: 640px; }
.hero h1 {
  font-size: var(--text-hero); line-height: 1.08; font-family: var(--font-display);
  font-weight: 700; color: var(--color-ink); margin-bottom: var(--space-6);
}
.hero-lead {
  font-size: var(--text-lg); line-height: 1.65;
  color: var(--color-on-surface-muted-now); margin-bottom: var(--space-8);
}
.hero-cta-group {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4); margin-bottom: var(--space-8);
}
.hero-ghost-links {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4) var(--space-6);
}
.hero-visual { display: flex; justify-content: center; align-items: center; }
.hero-portrait {
  width: 280px; height: 280px; border-radius: 50%; object-fit: cover;
  border: 4px solid var(--color-primary-light); box-shadow: 0 12px 40px rgba(0,0,0,0.12);
}
@media (min-width: 768px) { .hero-portrait { width: 360px; height: 360px; } }
@media (min-width: 1024px) { .hero-portrait { width: 400px; height: 400px; } }

/* Hero entrance animation */
@media (prefers-reduced-motion: no-preference) {
  .hero h1, .hero-lead, .hero-cta-group, .hero-ghost-links, .hero-visual {
    opacity: 0; transform: translateY(20px);
    animation: fade-up 400ms var(--ease-out) forwards;
  }
  .hero h1         { animation-delay: 100ms; }
  .hero-lead       { animation-delay: 200ms; }
  .hero-cta-group  { animation-delay: 300ms; }
  .hero-ghost-links{ animation-delay: 400ms; }
  .hero-visual     { animation-delay: 250ms; }
}
@keyframes fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Trust strip */
.trust-strip {
  margin-top: var(--space-16); padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-now);
}
.trust-label {
  font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--color-on-surface-muted-now); margin-bottom: var(--space-4); display: block;
}
.trust-logos {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4) var(--space-6);
  font-size: var(--text-sm); font-weight: 500; color: var(--color-on-surface-muted-now);
  text-transform: uppercase; letter-spacing: 0.04em;
}
.trust-logos span { display: inline-flex; align-items: center; gap: var(--space-2); white-space: nowrap; }
.trust-logos .sep { color: var(--color-border-now); font-weight: 400; }

/* ===================== 8. WHAT I DO ===================== */
.what-i-do { background-color: var(--color-surface-now); }
.value-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-6); }
@media (min-width: 768px) {
  .value-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
}
.value-card {
  background-color: var(--color-surface-alt-now); border-left: 4px solid var(--color-primary);
  border-radius: 0 12px 12px 0; padding: var(--space-6);
  transition: transform var(--transition-base) var(--ease-out),
              box-shadow var(--transition-base) var(--ease-out);
}
.value-card:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,0,0,0.06); }
.value-card-icon {
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  margin-bottom: var(--space-4); color: var(--color-primary);
}
.value-card-icon svg { width: 28px; height: 28px; stroke-width: 1.5; }
.value-card h3 {
  font-size: var(--text-lg); font-family: var(--font-display); font-weight: 600;
  color: var(--color-ink); margin-bottom: var(--space-3);
}
.value-card p { font-size: var(--text-sm); color: var(--color-on-surface-muted-now); line-height: 1.6; }

/* ===================== 9. PORTFOLIO ===================== */
.portfolio { background-color: var(--color-surface-now); }
.portfolio-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-8); }
@media (min-width: 768px) {
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-8); }
}
.project-card {
  background-color: var(--color-surface-now); border: 1px solid var(--color-border-now);
  border-radius: 12px; overflow: hidden;
  transition: transform var(--transition-base) var(--ease-out),
              box-shadow var(--transition-base) var(--ease-out);
}
.project-card:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(0,0,0,0.08); }
.project-image {
  width: 100%; aspect-ratio: 16 / 10; object-fit: cover; background-color: var(--color-surface-alt-now);
}
.project-body { padding: var(--space-5) var(--space-6) var(--space-6); }
.project-meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); margin-bottom: var(--space-3);
}
.project-type {
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-primary);
  text-transform: uppercase; letter-spacing: 0.05em;
}
.project-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-4); }
.project-card h3 {
  font-size: var(--text-xl); font-family: var(--font-display); font-weight: 600;
  color: var(--color-ink); margin-bottom: var(--space-3);
}
.project-card p {
  font-size: var(--text-sm); color: var(--color-on-surface-muted-now); line-height: 1.6; margin-bottom: var(--space-3);
}
.project-result {
  font-size: var(--text-sm); font-style: italic; color: var(--color-on-surface-now);
  margin-bottom: var(--space-4); padding-left: var(--space-3); border-left: 2px solid var(--color-primary);
}
.project-cta {
  font-size: var(--text-sm); font-weight: 600; color: var(--color-primary);
  display: inline-flex; align-items: center; gap: var(--space-2);
  min-height: 44px; min-width: 44px; transition: gap var(--transition-fast) ease;
}
.project-cta:hover { gap: var(--space-3); }
.project-cta svg { width: 16px; height: 16px; }
.portfolio-footer { margin-top: var(--space-12); text-align: center; }

/* ===================== 10. SERVICES ===================== */
.services { background-color: var(--color-surface-alt-now); }
.services-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-6); }
@media (min-width: 640px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .services-grid { grid-template-columns: repeat(3, 1fr); } }
.service-card {
  background-color: var(--color-surface-now); border-top: 4px solid var(--color-primary);
  border-radius: 0 0 12px 12px; padding: var(--space-6);
  transition: transform var(--transition-base) var(--ease-out),
              box-shadow var(--transition-base) var(--ease-out),
              border-color var(--transition-fast) ease;
}
.service-card:hover {
  transform: translateY(-4px); box-shadow: 0 8px 30px rgba(217,154,33,0.12);
  border-top-color: var(--color-primary-light);
}
.service-number {
  font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-primary);
  margin-bottom: var(--space-2); display: block;
}
.service-card h3 {
  font-size: var(--text-lg); font-family: var(--font-display); font-weight: 600;
  color: var(--color-ink); margin-bottom: var(--space-3);
}
.service-card p {
  font-size: var(--text-sm); color: var(--color-on-surface-muted-now); line-height: 1.6; margin-bottom: var(--space-5);
}
.service-cta {
  font-size: var(--text-sm); font-weight: 600; color: var(--color-primary);
  display: inline-flex; align-items: center; gap: var(--space-2);
  min-height: 44px; min-width: 44px; transition: gap var(--transition-fast) ease;
}
.service-cta:hover { gap: var(--space-3); }

/* ===================== 11. STORY + TIMELINE ===================== */
.story { background-color: var(--color-surface-now); }
.story-inner { display: grid; grid-template-columns: 1fr; gap: var(--space-12); }
@media (min-width: 1024px) {
  .story-inner { grid-template-columns: 1fr 1fr; gap: var(--space-16); }
}
.story-text p { font-size: var(--text-lg); line-height: 1.7; color: var(--color-on-surface-now); margin-bottom: var(--space-6); }
.story-text p:last-child { margin-bottom: 0; }

.timeline { position: relative; padding-left: var(--space-8); }
.timeline::before {
  content: ''; position: absolute; left: 6px; top: 6px; bottom: 6px;
  width: 2px; background-color: var(--color-border-now);
}
.timeline-item { position: relative; padding-bottom: var(--space-5); }
.timeline-item::before {
  content: ''; position: absolute; left: calc(-1 * var(--space-8) + 2px); top: 6px;
  width: 10px; height: 10px; border-radius: 50%; background-color: var(--color-primary);
  border: 2px solid var(--color-surface-now); box-shadow: 0 0 0 2px var(--color-primary-light);
}
.timeline-year {
  font-family: var(--font-mono); font-size: var(--text-xs); font-weight: 600;
  color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.04em;
  margin-bottom: var(--space-1); display: block;
}
.timeline-desc { font-size: var(--text-sm); line-height: 1.5; color: var(--color-on-surface-now); }

/* ===================== 12. CONTACT ===================== */
.contact { background-color: var(--color-ink); color: var(--color-surface); }
.contact .section-header .h2,
.contact .section-header .section-label { color: var(--color-surface); }
.contact .section-header .lead { color: var(--color-on-surface-muted-now); }
.contact-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-6); }
@media (min-width: 768px) { .contact-grid { grid-template-columns: repeat(2, 1fr); } }
.contact-card {
  background-color: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px; padding: var(--space-6);
  transition: background-color var(--transition-base) ease,
              border-color var(--transition-base) ease,
              transform var(--transition-base) var(--ease-out);
}
.contact-card:hover {
  background-color: rgba(255,255,255,0.07); border-color: rgba(217,154,33,0.3); transform: translateY(-4px);
}
.contact-card-label {
  font-family: var(--font-display); font-size: var(--text-xl); font-weight: 600;
  color: var(--color-surface); margin-bottom: var(--space-2); display: block;
}
.contact-card-desc {
  font-size: var(--text-sm); color: var(--color-on-surface-muted-now); margin-bottom: var(--space-4);
}
.contact-card-cta {
  font-size: var(--text-sm); font-weight: 600; color: var(--color-primary);
  display: inline-flex; align-items: center; gap: var(--space-2);
  min-height: 44px; min-width: 44px; transition: gap var(--transition-fast) ease;
}
.contact-card-cta:hover { gap: var(--space-3); }
.contact-info {
  margin-top: var(--space-12); text-align: center; font-size: var(--text-sm); color: var(--color-on-surface-muted-now);
}
.contact-info a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 2px; }

/* ===================== 13. FOOTER ===================== */
.site-footer {
  background-color: var(--color-ink); border-top: 1px solid rgba(255,255,255,0.06);
  padding: var(--space-8) 0;
}
.footer-inner {
  display: flex; flex-direction: column; align-items: center; gap: var(--space-4); text-align: center;
}
@media (min-width: 768px) {
  .footer-inner { flex-direction: row; justify-content: space-between; text-align: left; }
}
.footer-copy { font-size: var(--text-sm); color: var(--color-on-surface-muted-now); }
.footer-links { display: flex; align-items: center; gap: var(--space-4); }
.footer-link {
  font-size: var(--text-sm); font-weight: 500; color: var(--color-on-surface-muted-now);
  min-height: 44px; min-width: 44px; display: inline-flex; align-items: center;
  transition: color var(--transition-fast) ease;
}
.footer-link:hover { color: var(--color-primary); }

/* ===================== 14. SCROLL REVEAL ===================== */
.reveal {
  opacity: 0; transform: translateY(24px);
}
@media (prefers-reduced-motion: no-preference) {
  .reveal.is-visible {
    opacity: 1; transform: translateY(0);
    transition: opacity 400ms var(--ease-out), transform 400ms var(--ease-out);
  }
  .reveal.is-visible.stagger-1 { transition-delay: 80ms; }
  .reveal.is-visible.stagger-2 { transition-delay: 160ms; }
  .reveal.is-visible.stagger-3 { transition-delay: 240ms; }
  .reveal.is-visible.stagger-4 { transition-delay: 320ms; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* ===================== 15. DARK MODE SPECIFIC FIXES ===================== */
@media (prefers-color-scheme: dark) {
  .h1, .h2, .h3 { color: var(--color-surface); }
  .value-card { background-color: var(--color-surface-alt-dark); }
  .project-card {
    background-color: var(--color-surface-alt-dark);
    border-color: var(--color-border-dark);
  }
  .service-card { background-color: var(--color-surface-dark); }
  .hero-portrait { border-color: rgba(217,154,33,0.3); }
  .timeline-item::before { border-color: var(--color-surface-dark); }
}

/* ===================== 16. RESPONSIVE UTILITIES ===================== */
@media (max-width: 767px) {
  .hero-cta-group { flex-direction: column; align-items: flex-start; }
}

/* Ensure no horizontal scroll anywhere */
html, body { overflow-x: hidden; }