/* =========================================================
   DEAN BEKKER — bekker.pro
   Design system: drawing-sheet / title-block motif
   Palette:
     Sheet white   #FFFFFF  (light bg)
     Vellum        #F3F5F5  (light alt bg)
     Graphite      #1A1D1F  (light primary text)
     Steel         #5C6570  (light secondary text)
     Blueprint     #1D7A8A  (accent — cyanotype blueprint teal)
     Ink           #14171A  (dark bg)
   Type: Open Sans (display/body) + IBM Plex Mono (data/labels)
   ========================================================= */

* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #edf0f0;
  --bg-alt: #dfe3e4;
  --surface: #ffffff;
  --text: #1a1d1f;
  --text-secondary: #5c6570;
  --border: #cbd1d2;
  --border-soft: #dde1e2;
  --grid-dot: #b7bfc1;
  --accent: #1d7a8a;
  --accent-hover: #17606d;
  --accent-soft: #e5f2f4;
  --accent-soft-text: #0f4048;
  --focus-ring: #1d7a8a;
  --danger: #b3453f;

  --font-sans: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;

  --radius-sm: 2px;
  --radius-md: 3px;

  --container: 1140px;
  --transition: 0.18s ease;
}

[data-theme="dark"] {
  --bg: #14171a;
  --bg-alt: #1b1f23;
  --surface: #1b1f23;
  --text: #f2f3f4;
  --text-secondary: #9ba3ab;
  --border: #2b3034;
  --accent: #35a7b8;
  --accent-hover: #45b8c9;
  --accent-soft: #16323a;
  --accent-soft-text: #7dd3e0;
  --focus-ring: #35a7b8;
  --border-soft: #21262b;
  --danger: #e0776f;
  --grid-dot: #3a4046;
}

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}

img { max-width: 100%; display: block; }

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

h1 { font-size: clamp(2.5rem, 6vw, 3.75rem); font-weight: 800; }
h2 { font-size: clamp(1.75rem, 4vw, 2.25rem); }
h3 { font-size: 1.125rem; }

p { color: var(--text-secondary); }

/* --- Eyebrow / sheet tags --- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-3);
}

.eyebrow::before {
  content: '';
  width: 14px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
}

/* --- Dimension-line divider --- */
.dim-divider {
  position: relative;
  height: 1px;
  background: var(--border);
  margin: 0 auto;
}
.dim-divider::before,
.dim-divider::after {
  content: '';
  position: absolute;
  top: -4px;
  width: 1px;
  height: 9px;
  background: var(--border);
}
.dim-divider::before { left: 0; }
.dim-divider::after { right: 0; }

/* =========================================================
   HEADER / NAV
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.logo-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}
.logo-text {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

@media (max-width: 480px) {
  .logo-text { display: none; }
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.site-nav a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.site-nav a:hover { color: var(--text); }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: var(--text);
  transition: background var(--transition);
}
.icon-btn:hover { background: var(--bg-alt); }
.icon-btn svg { width: 19px; height: 19px; }

#icon-sun, #icon-moon { display: none; }
[data-theme="light"] #icon-sun { display: block; }
[data-theme="dark"] #icon-moon { display: block; }

.nav-toggle { display: none; }

@media (max-width: 768px) {
  .site-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: var(--space-2) 0;
    display: none;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a {
    width: 100%;
    padding: var(--space-4) var(--space-5);
  }
  .site-nav a:hover { background: var(--bg-alt); }
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
  }
  .nav-toggle svg { width: 20px; height: 20px; }
  #icon-menu, #icon-close { display: none; }
  .nav-toggle:not(.is-open) #icon-menu { display: block; }
  .nav-toggle.is-open #icon-close { display: block; }
}

/* =========================================================
   BUTTONS
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn svg { width: 15px; height: 15px; transition: transform var(--transition); }
.btn:hover svg { transform: translateX(3px); }

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  border: 1px solid var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  padding: var(--space-10) 0 var(--space-8);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--grid-dot) 1.4px, transparent 1.4px);
  background-size: 44px 44px;
  background-position: 22px 22px;
  opacity: 0.6;
  -webkit-mask-image: linear-gradient(to bottom, black, transparent 85%);
  mask-image: linear-gradient(to bottom, black, transparent 85%);
  pointer-events: none;
}

[data-theme="dark"] .hero::before {
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.55;
}

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

.hero .eyebrow { }

.hero h1 { margin-bottom: var(--space-4); }

.hero-tagline {
  font-size: 1.1rem;
  max-width: 560px;
  margin-bottom: var(--space-6);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

/* Meta strip — mini title block under hero */
.meta-strip {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--border);
  max-width: 620px;
}
.meta-strip div {
  padding: var(--space-3) var(--space-4);
  border-left: 1px solid var(--border);
}
.meta-strip div:first-child { border-left: none; }
.meta-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.3rem;
}
.meta-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
}

@media (max-width: 560px) {
  .meta-strip { grid-template-columns: 1fr; }
  .meta-strip div { border-left: none; border-top: 1px solid var(--border); }
  .meta-strip div:first-child { border-top: none; }
}

/* =========================================================
   SECTIONS (shared)
   ========================================================= */
.section {
  padding: var(--space-9) 0;
}
.section-alt { background: var(--bg-alt); }

.section-head { max-width: 640px; margin-bottom: var(--space-7); }
.section-head p { margin-top: var(--space-3); font-size: 1.02rem; }

/* =========================================================
   ABOUT
   ========================================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

.about-body p { margin-bottom: var(--space-4); font-size: 1.02rem; }
.about-body p:last-child { margin-bottom: 0; }

.stat-list {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
}
.stat-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border);
}
.stat-item:first-child { border-top: none; }
.stat-item .stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}
.stat-item .stat-value {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent);
  font-size: 0.95rem;
}

@media (max-width: 768px) {
  .about-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   SKILLS
   ========================================================= */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.skill-card {
  background: var(--surface);
  padding: var(--space-6) var(--space-5);
  transition: background var(--transition);
}
.skill-card:hover { background: var(--bg-alt); }

.skill-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  border: 1px solid var(--border);
  margin-bottom: var(--space-4);
}
.skill-icon svg { width: 19px; height: 19px; }

.skill-card h3 { margin-bottom: var(--space-2); }
.skill-card p { font-size: 0.9rem; margin-bottom: var(--space-4); }

.status-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  background: var(--accent-soft);
  color: var(--accent-soft-text);
}

/* =========================================================
   PROJECTS
   ========================================================= */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
}

.project-card {
  border: 1px dashed var(--border);
  padding: var(--space-6) var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-height: 220px;
}

.project-card .skill-icon { margin-bottom: 0; }

.project-card .pending-tag {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.project-card h3 { margin-top: auto; }
.project-card p { font-size: 0.88rem; }

/* =========================================================
   CONTACT CTA (homepage snippet)
   ========================================================= */
.contact-cta {
  text-align: center;
}
.contact-cta .container { max-width: 620px; }
.contact-cta h2 { margin-bottom: var(--space-3); }
.contact-cta p { margin-bottom: var(--space-6); font-size: 1.02rem; }
.contact-cta .btn { margin: 0 auto; }

/* =========================================================
   CONTACT PAGE
   ========================================================= */
.contact-page { padding: var(--space-9) 0; }
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-9);
}

.contact-info h1 { margin-bottom: var(--space-4); }
.contact-info p { margin-bottom: var(--space-6); }

.contact-direct {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  margin-bottom: var(--space-3);
  transition: border-color var(--transition);
}
.contact-direct:hover { border-color: var(--accent); }
.contact-direct svg { width: 17px; height: 17px; color: var(--accent); flex-shrink: 0; }

.form-group { margin-bottom: var(--space-5); }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}
.form-group label .required {
  color: var(--danger);
  opacity: 0.75;
  transition: color var(--transition), opacity var(--transition);
}
.form-group.is-filled label .required {
  color: var(--text-secondary);
  opacity: 0.6;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  outline: none;
}
.form-group textarea { resize: vertical; min-height: 140px; }

.form-group.has-error input,
.form-group.has-error textarea {
  border-color: var(--danger);
  box-shadow: 0 0 0 1px var(--danger);
}

@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}
.shake { animation: shake 0.5s; }

#form-status {
  margin-top: var(--space-4);
  font-size: 0.9rem;
  display: none;
}
#form-status.show { display: block; }
#form-status.success { color: var(--accent); }
#form-status.error { color: var(--danger); }
#form-status.error a.mailto-fallback {
  color: var(--danger);
  text-decoration: underline;
}

@media (max-width: 768px) {
  .contact-layout { grid-template-columns: 1fr; gap: var(--space-7); }
}

.back-home {
  display: flex;
  justify-content: center;
  margin-top: var(--space-9);
}
.back-home-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition);
}
.back-home-link:hover { color: var(--accent); }
.back-home-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 50%;
  transition: border-color var(--transition), transform var(--transition);
}
.back-home-link:hover .back-home-arrow {
  border-color: var(--accent);
  transform: translateY(-2px);
}
.back-home-arrow svg { width: 17px; height: 17px; }

/* =========================================================
   FOOTER — TITLE BLOCK
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--border);
  margin-top: var(--space-9);
}

.title-block {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.title-block div {
  padding: var(--space-5);
  border-left: 1px solid var(--border);
  text-align: center;
}
.title-block div:first-child { border-left: none; }

.title-block .meta-label {
  text-align: center;
  padding-bottom: var(--space-2);
  margin-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-soft);
}
.title-block .meta-value {
  display: block;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.footer-note {
  text-align: center;
  padding: var(--space-5);
  font-size: 0.8rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
}
.footer-note a { color: var(--accent); }
.footer-note a:hover { text-decoration: underline; }

@media (max-width: 700px) {
  .title-block { grid-template-columns: repeat(2, 1fr); }
  .title-block div:nth-child(3) { border-left: none; }
  .title-block div:nth-child(3), .title-block div:nth-child(4) { border-top: 1px solid var(--border); }
}

/* =========================================================
   SCROLL REVEAL
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}