/* ============================================================
   BKPO — Computer Systems Design
   No templates. No gradients. No 3-column grids. No rgba text.
   ============================================================ */

/* --- CUSTOM PROPERTIES --- */
:root {
  --black: #11100a;
  --white: #f5f3ed;
  --accent: #e8a820;
  --accent-dim: #c48c10;
  --gray-100: #e8e5dd;
  --gray-200: #c4c0b5;
  --gray-600: #5c5950;
  --gray-800: #2a2822;
  --gray-900: #1a1812;
  --border: 2px solid var(--black);
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 3rem;
  --space-xl: 5rem;
  --space-2xl: 8rem;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--black);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration-thickness: 2px; text-underline-offset: 3px; }
a:hover, a:focus-visible { color: var(--accent-dim); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

ul, ol { padding-left: 1.25rem; }
li + li { margin-top: 0.3rem; }

/* --- SKIP LINK --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  background: var(--black);
  color: var(--white);
  padding: 0.5rem 1rem;
  z-index: 1000;
  font-weight: 600;
  border-radius: 0 0 4px 4px;
}
.skip-link:focus { top: 0; }

/* --- HEADER --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: var(--border);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--black);
}
.logo svg { width: 40px; height: 40px; color: var(--black); }
.logo-text {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.nav-list {
  list-style: none;
  display: flex;
  gap: 2rem;
  padding: 0;
  font-weight: 600;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.nav-list a { text-decoration: none; color: var(--black); }
.nav-list a:hover { color: var(--accent-dim); }
.nav-list li { margin-top: 0; }

.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 3px;
  background: var(--black);
  margin: 5px 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* --- HERO --- */
.hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-md) var(--space-xl);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.hero-title { font-size: clamp(3rem, 7vw, 5.5rem); font-weight: 900; line-height: 0.95; letter-spacing: -0.03em; }
.hero-line { display: block; }
.hero-accent { color: var(--accent); }

.hero-sub {
  margin-top: var(--space-lg);
  font-size: 1.25rem;
  max-width: 38ch;
  line-height: 1.5;
  color: var(--gray-600);
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding-top: 0.5rem;
}

.stat-block {
  border-left: var(--border);
  padding-left: var(--space-md);
}

.stat-number {
  display: block;
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--black);
}

.stat-label {
  display: block;
  margin-top: 0.3rem;
  font-size: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-600);
}

/* --- SECTIONS --- */
.section-label {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-dim);
  margin-bottom: var(--space-lg);
}

/* --- WORK --- */
.section-work {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
  border-top: var(--border);
}

.work-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}

.work-item {
  border-bottom: var(--border);
  padding: var(--space-lg) 0;
  position: relative;
}
.work-item:nth-child(odd) { border-right: var(--border); padding-right: var(--space-lg); }
.work-item:nth-child(even) { padding-left: var(--space-lg); }

.work-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-dim);
  letter-spacing: 0.1em;
  margin-bottom: var(--space-xs);
}

.work-title {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin-bottom: var(--space-xs);
}

.work-desc {
  color: var(--gray-600);
  max-width: 40ch;
  line-height: 1.5;
}

/* --- ABOUT --- */
.section-about {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md);
  border-top: var(--border);
}

.about-lede {
  font-size: 1.5rem;
  font-weight: 700;
  max-width: 42ch;
  line-height: 1.3;
  margin-bottom: var(--space-lg);
}

.about-details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.about-sub {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-dim);
  margin-bottom: var(--space-sm);
}

.about-col p {
  color: var(--gray-600);
  max-width: 42ch;
}

/* --- CONTACT --- */
.section-contact {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md) var(--space-2xl);
  border-top: var(--border);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

.contact-form { display: flex; flex-direction: column; gap: var(--space-md); }

.form-group { display: flex; flex-direction: column; gap: 0.35rem; }

.form-group label {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gray-600);
}

.form-group label span { color: var(--accent-dim); }

.form-group input,
.form-group textarea {
  font-family: var(--font-sans);
  font-size: 1rem;
  padding: 0.85rem 1rem;
  border: var(--border);
  background: var(--white);
  color: var(--black);
  border-radius: 0;
  transition: border-color 0.15s ease;
  width: 100%;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--gray-200); }

.form-group input[aria-invalid="true"],
.form-group textarea[aria-invalid="true"] { border-color: #c44; }

.form-error {
  font-size: 0.85rem;
  color: #c44;
  font-weight: 600;
  min-height: 1.2em;
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2.5rem;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--white);
  background: var(--black);
  border: var(--border);
  border-color: var(--black);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
  align-self: flex-start;
  border-radius: 0;
}

.btn-submit:hover { background: var(--white); color: var(--black); }
.btn-submit:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-submit:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-submit.loading .btn-label { visibility: hidden; }
.btn-submit.loading .btn-spinner {
  display: block;
  width: 18px;
  height: 18px;
  border: 2px solid var(--white);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  position: absolute;
}
.btn-submit:hover.loading .btn-spinner { border-color: var(--black); border-top-color: transparent; }

.btn-spinner { display: none; }

@keyframes spin { to { transform: rotate(360deg); } }

.form-success {
  font-size: 1rem;
  font-weight: 600;
  color: #2a7d2a;
  padding: var(--space-sm);
  border: 2px solid #2a7d2a;
}

.form-success[hidden] { display: none; }

/* --- CONTACT INFO --- */
.contact-info { padding-top: 0.2rem; }

.contact-dl {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-item dt {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-dim);
  margin-bottom: 0.2rem;
}

.contact-item dd {
  font-size: 1.125rem;
  line-height: 1.5;
  color: var(--black);
}

.contact-item a { text-decoration: none; font-weight: 600; }

/* --- FOOTER --- */
.site-footer {
  border-top: var(--border);
  background: var(--black);
  color: var(--gray-100);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer-brand { display: flex; align-items: center; gap: var(--space-md); }

.footer-logo {
  font-weight: 900;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.footer-legal { font-size: 0.85rem; color: var(--gray-200); }

.footer-nav { display: flex; gap: var(--space-md); }
.footer-nav a {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-100);
  text-decoration: none;
}
.footer-nav a:hover { color: var(--accent); }

/* --- LEGAL PAGES --- */
.legal-main { max-width: 780px; margin: 0 auto; padding: var(--space-xl) var(--space-md) var(--space-2xl); }

.legal-doc { font-size: 1.0625rem; line-height: 1.7; }

.legal-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-xs);
}

.legal-effective {
  font-size: 0.95rem;
  color: var(--gray-600);
  margin-bottom: var(--space-lg);
  font-weight: 500;
}

.legal-doc h2 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--gray-100);
}

.legal-doc h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
  color: var(--gray-800);
}

.legal-doc p { margin-bottom: var(--space-sm); }

.legal-doc ul { margin-bottom: var(--space-sm); }

.legal-doc section:first-of-type h2 { border-top: none; margin-top: var(--space-lg); }

.legal-address {
  font-style: normal;
  line-height: 1.6;
  color: var(--black);
  margin-top: var(--space-sm);
}

.legal-address a { font-weight: 600; }

/* --- SCROLL ANIMATIONS --- */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-animate].visible {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  [data-animate] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  html { scroll-behavior: auto; }
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
  .hero-grid,
  .work-list,
  .about-details,
  .contact-grid { grid-template-columns: 1fr; }

  .hero { padding: var(--space-xl) var(--space-md); }
  .hero-stat { flex-direction: row; flex-wrap: wrap; gap: var(--space-md); }
  .stat-block { flex: 1; min-width: 120px; }

  .work-item:nth-child(odd) { border-right: none; padding-right: 0; }
  .work-item:nth-child(even) { padding-left: 0; }
  .work-item { padding: var(--space-md) 0; }

  .contact-grid { gap: var(--space-lg); }

  .nav-toggle { display: block; }
  .nav-list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--white);
    border-bottom: var(--border);
    padding: var(--space-sm) var(--space-md);
    gap: 0.75rem;
  }
  .nav-list.open { display: flex; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-brand { flex-direction: column; gap: 0.25rem; }

  .legal-doc { font-size: 1rem; }
}

/* --- PRINT --- */
@media print {
  .site-header, .site-footer, .nav-toggle, .skip-link { display: none; }
  body { font-size: 12pt; color: #000; background: #fff; }
  .hero, .section-work, .section-about, .section-contact { padding: 1rem 0; border: none; }
  a { color: #000; text-decoration: underline; }
}