/* ============================================================
   Site Styles
   Component and element styles referencing tokens.css variables.
   Tailwind handles layout (flex, grid, spacing, responsive).
   This file handles visual styling (color, type, borders, effects).
   ============================================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  transition: background-color 0.3s var(--ease-out), color 0.3s var(--ease-out);
}

::selection {
  background: var(--accent);
  color: var(--color-white);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
  color: var(--text-heading);
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); margin: 0; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); margin: 0; }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); margin: 0; }
h4 { font-size: 1.15rem; margin: 0; }

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

.lead {
  font-size: 1.15rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ---------- Links ---------- */
a {
  color: var(--text-heading);
  text-decoration: none;
  transition: color 0.3s var(--ease-out);
}

a:hover {
  color: var(--accent);
}

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.85rem 2.4rem;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--btn-text);
  background-color: var(--btn-bg);
  border: 1px solid var(--btn-bg);
  transition: all 0.35s var(--ease-out);
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  background-color: var(--accent);
  border-color: var(--accent);
  color: var(--color-white);
}

.btn-outline {
  background-color: transparent;
  color: var(--btn-bg);
  border-color: var(--btn-bg);
}

.btn-outline:hover {
  background-color: var(--btn-bg);
  color: var(--btn-text);
}

/* ---------- Labels ---------- */
.label {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.label-accent {
  color: var(--accent);
}

/* ---------- Divider ---------- */
.divider {
  width: 48px;
  height: 1px;
  background-color: var(--accent);
}

/* ---------- Navigation ---------- */
.site-nav {
  padding-top: 1.4rem;
  padding-bottom: 1.4rem;
  background-color: var(--bg);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.3s var(--ease-out),
              background-color 0.3s var(--ease-out);
}

.site-nav.scrolled {
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

.site-nav .brand {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  letter-spacing: 0.08em;
  color: var(--text-heading);
  text-decoration: none;
}

.site-nav .nav-link {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text);
  padding: 0.5rem 0;
  text-decoration: none;
  transition: color 0.3s var(--ease-out);
}

.site-nav .nav-link:hover,
.site-nav .nav-link.active {
  color: var(--accent);
}

/* ---------- Dark Mode Toggle ---------- */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.4rem 0.6rem;
  font-size: 0.85rem;
  line-height: 1;
  transition: color 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}

.theme-toggle:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ---------- Hero ---------- */
.hero {
  min-height: 80vh;
  background-color: var(--bg);
  position: relative;
  overflow: hidden;
}

.hero-tagline {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ---------- Geometric Accents ---------- */
.geo-line {
  position: absolute;
  background-color: var(--border);
}

.geo-line-v {
  width: 1px;
  height: 160px;
}

.geo-line-h {
  height: 1px;
  width: 160px;
}

/* ---------- Page Header (interior pages) ---------- */
.page-header {
  background-color: var(--bg-alt);
  border-bottom: 1px solid var(--border);
}

/* ---------- Sections ---------- */
.section-alt {
  background-color: var(--bg-alt);
}

.section-dark {
  background-color: var(--bg-elevated);
  color: var(--text-muted);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--text-heading);
}

/* ---------- Cards ---------- */
.card {
  border: 1px solid var(--border);
  background-color: var(--bg);
  transition: border-color 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
}

.card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

/* ---------- Blockquote ---------- */
blockquote {
  border-left: 2px solid var(--accent);
  padding-left: var(--sp-3);
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--text);
  line-height: 1.6;
  margin: 0;
}

blockquote cite {
  display: block;
  margin-top: var(--sp-2);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-style: normal;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ---------- Footer ---------- */
.site-footer {
  background-color: var(--color-ink);
  color: var(--color-stone);
}

.site-footer a {
  color: var(--color-stone);
  font-size: 0.9rem;
  transition: color 0.3s var(--ease-out);
}

.site-footer a:hover {
  color: var(--color-white);
}

.footer-brand {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--color-white);
  letter-spacing: 0.08em;
}

.footer-heading {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-white);
}

.site-footer p {
  color: var(--color-stone);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr auto auto;
  }
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.82rem;
}

.footer-bottom p {
  color: var(--color-warm-gray);
}

/* ---------- Scroll Progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background-color: var(--accent);
  z-index: 9999;
  transition: width 0.1s linear;
  width: 0;
}

/* ---------- Fade-in Animation ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Article / Blog Post ---------- */
.article-content h2 {
  margin-top: var(--sp-6);
  margin-bottom: var(--sp-2);
}

.article-content h3 {
  margin-top: var(--sp-5);
  margin-bottom: var(--sp-2);
}

.article-content p {
  margin-top: 0;
  margin-bottom: var(--sp-3);
  max-width: 62ch;
}

.article-content ul,
.article-content ol {
  padding-left: var(--sp-3);
  margin-bottom: var(--sp-3);
  color: var(--text);
}

.article-content li {
  margin-bottom: var(--sp-1);
}

.article-content blockquote {
  margin: var(--sp-5) 0;
}

.article-content pre {
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  padding: var(--sp-3);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.6;
  margin: var(--sp-4) 0;
}

.article-content code {
  font-family: var(--font-mono);
  font-size: 0.88rem;
}

.article-content p code,
.article-content li code {
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  padding: 0.15rem 0.4rem;
}

/* --- Syntax highlighting (Prism overrides) --- */

/* Kill Prism's text-shadow (causes pixelated halos) */
pre[class*="language-"] *,
code[class*="language-"] * { text-shadow: none !important; }

/* Block code containers */
pre[class*="language-"],
code[class*="language-"] {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text);
  text-shadow: none;
}
pre[class*="language-"] {
  background-color: var(--bg-alt);
  border: 1px solid var(--border);
  padding: var(--sp-3);
  margin: var(--sp-4) 0;
}

/* Light mode: warm, muted token colors that match the palette */
.token.comment,
.token.prolog,
.token.doctype,
.token.cdata       { color: var(--color-warm-gray); font-style: italic; }
.token.punctuation  { color: var(--color-slate); }
.token.property,
.token.tag,
.token.boolean,
.token.number,
.token.constant,
.token.symbol       { color: #8a5534; }
.token.selector,
.token.attr-name,
.token.string,
.token.char,
.token.builtin      { color: #6a7c42; }
.token.operator,
.token.entity,
.token.url,
.language-css .token.string { color: var(--color-slate); }
.token.atrule,
.token.attr-value,
.token.keyword       { color: #7b6243; }
.token.function,
.token.class-name    { color: var(--color-accent); }
.token.regex,
.token.important,
.token.variable      { color: #9a6850; }

/* Dark mode: Kanagawa Wave */
[data-theme="dark"] pre[class*="language-"],
[data-theme="dark"] code[class*="language-"] {
  color: #dcd7ba;
}
[data-theme="dark"] pre[class*="language-"] {
  background-color: #1f1f28;
  border-color: #363646;
}
[data-theme="dark"] .token.comment,
[data-theme="dark"] .token.prolog,
[data-theme="dark"] .token.doctype,
[data-theme="dark"] .token.cdata       { color: #727169; font-style: italic; }
[data-theme="dark"] .token.punctuation  { color: #9cabca; }
[data-theme="dark"] .token.property,
[data-theme="dark"] .token.tag,
[data-theme="dark"] .token.boolean,
[data-theme="dark"] .token.number,
[data-theme="dark"] .token.constant,
[data-theme="dark"] .token.symbol       { color: #d27e99; }
[data-theme="dark"] .token.selector,
[data-theme="dark"] .token.attr-name,
[data-theme="dark"] .token.string,
[data-theme="dark"] .token.char,
[data-theme="dark"] .token.builtin      { color: #98bb6c; }
[data-theme="dark"] .token.operator,
[data-theme="dark"] .token.entity,
[data-theme="dark"] .token.url,
[data-theme="dark"] .language-css .token.string { color: #c0a36e; }
[data-theme="dark"] .token.atrule,
[data-theme="dark"] .token.attr-value,
[data-theme="dark"] .token.keyword       { color: #957fb8; }
[data-theme="dark"] .token.function,
[data-theme="dark"] .token.class-name    { color: #7e9cd8; }
[data-theme="dark"] .token.regex,
[data-theme="dark"] .token.important,
[data-theme="dark"] .token.variable      { color: #e6c384; }

/* System dark preference */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) pre[class*="language-"],
  :root:not([data-theme="light"]) code[class*="language-"] {
    color: #dcd7ba;
  }
  :root:not([data-theme="light"]) pre[class*="language-"] {
    background-color: #1f1f28;
    border-color: #363646;
  }
  :root:not([data-theme="light"]) .token.comment,
  :root:not([data-theme="light"]) .token.prolog,
  :root:not([data-theme="light"]) .token.doctype,
  :root:not([data-theme="light"]) .token.cdata       { color: #727169; font-style: italic; }
  :root:not([data-theme="light"]) .token.punctuation  { color: #9cabca; }
  :root:not([data-theme="light"]) .token.property,
  :root:not([data-theme="light"]) .token.tag,
  :root:not([data-theme="light"]) .token.boolean,
  :root:not([data-theme="light"]) .token.number,
  :root:not([data-theme="light"]) .token.constant,
  :root:not([data-theme="light"]) .token.symbol       { color: #d27e99; }
  :root:not([data-theme="light"]) .token.selector,
  :root:not([data-theme="light"]) .token.attr-name,
  :root:not([data-theme="light"]) .token.string,
  :root:not([data-theme="light"]) .token.char,
  :root:not([data-theme="light"]) .token.builtin      { color: #98bb6c; }
  :root:not([data-theme="light"]) .token.operator,
  :root:not([data-theme="light"]) .token.entity,
  :root:not([data-theme="light"]) .token.url,
  :root:not([data-theme="light"]) .language-css .token.string { color: #c0a36e; }
  :root:not([data-theme="light"]) .token.atrule,
  :root:not([data-theme="light"]) .token.attr-value,
  :root:not([data-theme="light"]) .token.keyword       { color: #957fb8; }
  :root:not([data-theme="light"]) .token.function,
  :root:not([data-theme="light"]) .token.class-name    { color: #7e9cd8; }
  :root:not([data-theme="light"]) .token.regex,
  :root:not([data-theme="light"]) .token.important,
  :root:not([data-theme="light"]) .token.variable      { color: #e6c384; }
}

.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-content a:hover {
  color: var(--accent-hover);
}

.article-meta {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}

/* ---------- Responsive Mobile Nav ---------- */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-heading);
  cursor: pointer;
  padding: 0.5rem;
  font-size: 1.25rem;
}

/* Desktop: hide mobile controls */
.mobile-controls {
  display: none !important;
}

@media (max-width: 767px) {
  .mobile-controls {
    display: flex !important;
  }

  .nav-toggle {
    display: block;
  }

  /* Hide desktop theme toggle */
  .nav-links .theme-toggle {
    display: none;
  }

  .site-nav .nav-inner {
    flex-wrap: wrap;
  }

  .nav-links {
    display: none !important;
    width: 100%;
    flex-direction: column;
    gap: 0 !important;
    padding-top: var(--sp-2);
    border-top: 1px solid var(--border);
    margin-top: var(--sp-2);
  }

  .nav-links.open {
    display: flex !important;
  }

  .nav-links .nav-link {
    padding: 0.75rem 0;
  }
}