/*
  C2Coder design system - "build log" style.
  Roboto + Roboto Mono, grid-paper ground, single copper accent.
  See DESIGN.md at the repo root for the full spec.
*/

:root {
  --paper: #f2f4f1;
  --ink: #12181c;
  --ink-soft: #4c555c;
  --ink-faint: #7e858b;
  --line: #ccd2cf;
  --accent: #bf5b2a;
  --accent-contrast: #fdf7f0;
  --console-bg: #12181c;
  --console-ink: #eef1ee;
  --console-accent: #e0895a;
  --sans: "Roboto", "Segoe UI", Arial, sans-serif;
  --mono: "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --paper: #0d1113;
  --ink: #e7ebe8;
  --ink-soft: #a9b1ad;
  --ink-faint: #626b67;
  --line: #262c2a;
  --accent: #e08a4f;
  --accent-contrast: #17110b;
  --console-bg: #eef1ee;
  --console-ink: #12181c;
  --console-accent: #bf5b2a;
  color-scheme: dark;
}

:root[data-tab="photo"] {
  --accent: #b23c34;
  --accent-contrast: #fdf4f1;
}
:root[data-theme="dark"][data-tab="photo"] {
  --accent: #e0776a;
  --accent-contrast: #1c0e0c;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 6.5rem; }
body {
  margin: 0;
  font-family: var(--sans);
  background: var(--paper);
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: -1px -1px;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
p { margin: 0; }
h1, h2, h3 { margin: 0; font-family: var(--sans); font-weight: 900; letter-spacing: -.01em; text-wrap: balance; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 28px; }
.tag-label {
  font-family: var(--mono); font-size: .78rem; font-weight: 500;
  letter-spacing: .08em; text-transform: uppercase; color: var(--accent);
}
.section-tag {
  display: block; font-family: var(--mono); font-size: .74rem; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px;
}

/* Masthead */
.masthead {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 3px double var(--ink);
}
.masthead-row { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 24px; }
.wordmark { font-family: var(--mono); font-weight: 700; font-size: 1.05rem; letter-spacing: -.01em; }
.wordmark-dot { color: var(--accent); }
.masthead-nav { display: flex; align-items: baseline; gap: 26px; }
.masthead-nav a {
  font-family: var(--mono); font-size: .82rem; font-weight: 500; color: var(--ink-soft);
  display: inline-flex; align-items: baseline; gap: 6px; border-bottom: 1px solid transparent;
  transition: color .15s ease, border-color .15s ease;
}
.masthead-nav a:hover { color: var(--ink); border-color: var(--accent); }
.nav-index { color: var(--accent); font-size: .72rem; }
.masthead-controls { display: flex; align-items: center; gap: 8px; }
.ctrl-btn {
  font-family: var(--mono); font-size: .72rem; font-weight: 700; letter-spacing: .06em;
  padding: 7px 12px; border: 1px solid var(--ink); background: transparent; color: var(--ink);
  cursor: pointer; transition: background .15s ease, color .15s ease;
}
.ctrl-btn:hover { background: var(--ink); color: var(--paper); }
.menu-btn { display: none; }
.masthead-meta {
  padding: 5px 28px 9px; font-family: var(--mono); font-size: .74rem; color: var(--ink-faint);
  letter-spacing: .03em; border-top: 1px solid var(--line);
}

/* Mobile nav overlay */
.nav-overlay {
  position: fixed; inset: 0; z-index: 70; background: var(--paper);
  display: flex; flex-direction: column; padding: 24px 28px;
  transform: translateY(-100%); transition: transform .25s ease;
}
.nav-overlay.open { transform: translateY(0); }
.nav-overlay-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 40px; }
.nav-overlay a {
  font-family: var(--mono); font-weight: 700; font-size: 1.7rem; padding: 14px 0;
  border-bottom: 1px solid var(--line); display: flex; gap: 16px; align-items: baseline;
}
.nav-overlay a .nav-index { font-size: 1rem; }

section { padding: 88px 0; border-bottom: 1px solid var(--line); }
.section-head { max-width: 60ch; margin-bottom: 46px; }
.section-head h2 { font-size: clamp(1.6rem, 2.6vw, 2.15rem); }
.section-head p { margin-top: 12px; color: var(--ink-soft); font-size: 1.02rem; line-height: 1.65; }

/* Hero */
#home { padding-top: 72px; }
.hero-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 60px; align-items: start; }
h1 { font-size: clamp(2.3rem, 4.6vw, 3.6rem); line-height: 1.08; margin-top: 14px; }
.hero-body { margin-top: 26px; display: flex; flex-direction: column; gap: 16px; max-width: 58ch; }
.hero-body p { color: var(--ink-soft); font-size: 1.05rem; line-height: 1.7; }
.cta-row { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 12px; }
.btn {
  font-family: var(--mono); font-weight: 700; font-size: .84rem; letter-spacing: .04em; text-transform: uppercase;
  padding: 14px 24px; border: 1px solid var(--ink); transition: transform .12s ease, background .15s ease, color .15s ease;
  display: inline-block;
}
.btn:active { transform: translateY(1px); }
.btn-solid { background: var(--accent); color: var(--accent-contrast); border-color: var(--accent); }
.btn-solid:hover { opacity: .88; }
.btn-line { background: transparent; color: var(--ink); }
.btn-line:hover { background: var(--ink); color: var(--paper); }

.spec-box { border: 1px solid var(--ink); padding: 22px 24px; background: color-mix(in srgb, var(--paper) 60%, transparent); }
.spec-box-label {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-faint); margin-bottom: 14px;
}
.spec-row { padding: 14px 0; border-top: 1px dashed var(--line); }
.spec-row:first-of-type { border-top: none; padding-top: 0; }
.spec-key { display: block; font-weight: 700; font-size: .98rem; margin-bottom: 4px; }
.spec-val { display: block; color: var(--ink-soft); font-size: .9rem; line-height: 1.55; }

/* Log / projects */
.log-entry {
  padding: 30px 0; border-top: 1px solid var(--line);
  display: grid; grid-template-columns: 200px 1fr; gap: 28px;
}
.log-entry:first-child { border-top: none; padding-top: 0; }
.log-meta { display: flex; flex-direction: column; gap: 10px; }
.log-id { font-family: var(--mono); font-size: .76rem; color: var(--accent); letter-spacing: .04em; }
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  font-family: var(--mono); font-size: .7rem; padding: 3px 8px; border: 1px solid var(--line);
  color: var(--ink-soft); letter-spacing: .02em;
}
.log-entry h3 { font-size: 1.3rem; font-weight: 700; }
.log-entry-title-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.log-entry p { margin-top: 10px; color: var(--ink-soft); font-size: .98rem; line-height: 1.65; max-width: 62ch; }
.entry-link {
  display: inline-block; margin-top: 16px; font-family: var(--mono); font-size: .82rem; font-weight: 700;
  color: var(--accent); border-bottom: 1px solid var(--accent);
}

/* Status badge */
.status-badge {
  font-family: var(--mono); font-size: .66rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  padding: 3px 9px; border: 1px solid var(--accent); color: var(--accent); white-space: nowrap;
}
.status-badge.is-wip { background: var(--accent); color: var(--accent-contrast); }

/* Inventory (skills / setup) */
.inv-row {
  padding: 18px 0; border-top: 1px solid var(--line);
  display: grid; grid-template-columns: 200px 1fr; gap: 28px; align-items: baseline;
}
.inv-row:first-child { border-top: none; padding-top: 0; }
.inv-key { font-family: var(--mono); font-weight: 700; font-size: .88rem; letter-spacing: .03em; }
.inv-val { color: var(--ink-soft); font-size: .98rem; line-height: 1.7; }

/* Terminal / contact */
#contact { background: color-mix(in srgb, var(--ink) 4%, var(--paper)); }
.term-panel { background: var(--console-bg); color: var(--console-ink); border: 1px solid var(--ink); }
.term-bar { display: flex; gap: 7px; padding: 12px 16px; border-bottom: 1px solid color-mix(in srgb, var(--console-ink) 20%, transparent); }
.term-bar span { width: 10px; height: 10px; border-radius: 50%; background: color-mix(in srgb, var(--console-ink) 30%, transparent); }
.term-body { padding: 26px 28px 30px; font-family: var(--mono); font-size: .92rem; line-height: 2; }
.term-line .prompt { color: var(--console-accent); margin-right: 10px; }
.term-line a { border-bottom: 1px solid color-mix(in srgb, var(--console-ink) 40%, transparent); }
.term-line a:hover { border-color: var(--console-accent); color: var(--console-accent); }
.term-line.note { color: color-mix(in srgb, var(--console-ink) 55%, transparent); margin-top: 8px; }
.cursor-blink {
  display: inline-block; width: 8px; height: 1.1em; background: var(--console-accent);
  margin-left: 8px; vertical-align: text-bottom; animation: blink 1s steps(1) infinite;
}
@media (prefers-reduced-motion: reduce) { .cursor-blink { animation: none; } }
@keyframes blink { 50% { opacity: 0; } }

/* Project detail page */
.back-link {
  display: inline-flex; align-items: center; gap: 8px; margin-bottom: 30px;
  font-family: var(--mono); font-size: .8rem; font-weight: 500; color: var(--ink-soft);
}
.back-link:hover { color: var(--accent); }
.project-head-row { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 14px; }
.project-head h1 { margin-top: 0; font-size: clamp(1.9rem, 3.8vw, 2.9rem); }
.project-summary { margin-top: 22px; color: var(--ink-soft); font-size: 1.05rem; line-height: 1.7; max-width: 62ch; }
.project-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 60px; align-items: start; margin-top: 56px; }

.prose-section { padding: 26px 0; border-top: 1px solid var(--line); }
.prose-section:first-child { border-top: none; padding-top: 0; }
.prose-section h2 { font-size: 1.1rem; font-weight: 700; }
.prose-section p { margin-top: 10px; color: var(--ink-soft); font-size: .98rem; line-height: 1.7; max-width: 62ch; }

.file-list-label {
  font-family: var(--mono); font-size: .72rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-faint); margin-bottom: 14px;
}
.file-row {
  display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
  padding: 13px 0; border-top: 1px dashed var(--line);
}
.file-row:first-of-type { border-top: none; padding-top: 0; }
.file-name { font-family: var(--mono); font-weight: 700; font-size: .86rem; }
.file-download { font-family: var(--mono); font-size: .78rem; font-weight: 700; color: var(--accent); border-bottom: 1px solid var(--accent); flex-shrink: 0; }
.file-empty { font-family: var(--mono); font-size: .85rem; color: var(--ink-faint); }

/* Footer */
.colophon { padding: 34px 0; border-bottom: none; }
.colophon-row { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; }
.colophon .quote { font-family: var(--mono); font-size: .86rem; color: var(--ink-soft); }
.colophon .meta { font-family: var(--mono); font-size: .78rem; color: var(--ink-faint); }
.colophon .meta a { border-bottom: 1px solid color-mix(in srgb, var(--ink-faint) 45%, transparent); }
.colophon .meta a:hover { color: var(--accent); border-color: var(--accent); }

@media (max-width: 900px) {
  .hero-grid, .project-grid { grid-template-columns: 1fr; }
  .log-entry, .inv-row { grid-template-columns: 1fr; gap: 12px; }
}
@media (max-width: 760px) {
  .masthead-nav { display: none; }
  .menu-btn { display: inline-flex; }
  .masthead-meta { display: none; }
  section { padding: 60px 0; }
}

/* Pin footer to viewport bottom regardless of tab content length */
body { min-height: 100vh; display: flex; flex-direction: column; }
main { flex: 1 0 auto; }

/* Links header */
.links-head { padding: 56px 0 36px; }
.links-head .wordmark-lg { font-family: var(--mono); font-weight: 700; font-size: clamp(2rem, 6vw, 2.6rem); margin-top: 10px; letter-spacing: -.01em; }
.links-head .tagline { margin-top: 12px; color: var(--ink-soft); font-size: 1rem; line-height: 1.6; max-width: 50ch; }

/* Tab switch */
.tab-switch { display: flex; gap: 22px; margin: 8px 0 0; border-bottom: 1px solid var(--line); }
.tab-btn {
  font-family: var(--mono); font-size: .84rem; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  padding: 12px 2px 14px; background: none; border: none; border-bottom: 2px solid transparent;
  color: var(--ink-soft); cursor: pointer; display: inline-flex; align-items: baseline; gap: 8px;
  transition: color .15s ease, border-color .15s ease;
}
.tab-btn .nav-index { color: var(--accent); font-size: .74rem; }
.tab-btn.is-active { color: var(--ink); border-bottom-color: var(--accent); }
.tab-btn:hover { color: var(--ink); }

/* Link rows */
.link-list { padding: 10px 0 30px; }
.link-row {
  display: flex; align-items: center; gap: 18px; padding: 20px 0;
  border-top: 1px solid var(--line); transition: border-color .15s ease;
}
.link-row:first-child { border-top: none; }
.link-row-icon { flex-shrink: 0; width: 24px; height: 24px; color: var(--ink-soft); transition: color .15s ease; }
.link-row-body { flex: 1; min-width: 0; }
.link-row-label { display: block; font-weight: 700; font-size: 1.05rem; }
.link-row-sub { display: block; margin-top: 2px; font-family: var(--mono); font-size: .8rem; color: var(--ink-faint); }
.link-row-arrow { flex-shrink: 0; font-family: var(--mono); color: var(--ink-faint); transition: color .15s ease, transform .15s ease; }
.link-row:hover, .link-row:focus-visible { border-color: var(--accent); }
.link-row:hover .link-row-icon, .link-row:focus-visible .link-row-icon { color: var(--accent); }
.link-row:hover .link-row-arrow, .link-row:focus-visible .link-row-arrow { color: var(--accent); transform: translateX(3px); }

[hidden] { display: none !important; }

@media (max-width: 480px) {
  .link-row { padding: 18px 0; gap: 14px; }
  .link-row-label { font-size: 1rem; }
  .tab-switch { gap: 16px; }
}