/* ============================================
   Tyler Wince — CONSTRUCTIVIST POSTER Theme
   Bauhaus meets Soviet propaganda: bold geometry,
   diagonal stripes, commanding typography.
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=Work+Sans:ital,wght@0,300;0,400;0,600;0,700;0,800;1,400&family=JetBrains+Mono:wght@400;700&display=swap');

:root {
  --font-display: 'Bebas Neue', Impact, sans-serif;
  --font-system: 'Work Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'Work Sans', 'Helvetica Neue', sans-serif;
  --font-sans: 'Work Sans', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --font-hand: 'Work Sans', sans-serif;

  /* Constructivist palette */
  --color-cream: #F5F0E8;
  --color-red: #E63946;
  --color-red-dark: #C1121F;
  --color-navy: #1D3557;
  --color-navy-light: #264B7A;
  --color-ink: #1A1A1A;
  --color-ink-soft: #3A3A3A;
  --color-muted: #8A8A7A;
  --color-amber: #E9A820;
  --color-white: #FFFFFF;

  /* Semantic tokens */
  --color-bg: var(--color-cream);
  --color-paper: var(--color-white);
  --color-surface: var(--color-cream);
  --color-border: #D0C9B8;
  --color-border-light: #E0D9C8;
  --color-accent: var(--color-red);
  --color-accent-light: #F0656F;
  --color-accent-wash: rgba(230, 57, 70, 0.08);
  --color-rose: var(--color-red);
  --color-rose-dim: rgba(230, 57, 70, 0.1);
  --color-rose-glow: rgba(230, 57, 70, 0.06);
  --color-wine: var(--color-red-dark);
  --color-blush: #F0EBE0;
  --color-pink: var(--color-red);
  --color-pink-light: rgba(230, 57, 70, 0.15);
  --color-seal: var(--color-navy);
  --color-ribbon: var(--color-red);
  --color-lace: rgba(29, 53, 87, 0.03);
  --color-green: #2A9D6A;
  --color-green-light: #33B77D;
  --color-green-dim: rgba(42, 157, 106, 0.15);
  --color-green-wash: rgba(42, 157, 106, 0.1);
  --color-gold: #E9A820;
  --color-gold-dim: rgba(233, 168, 32, 0.2);
  --color-cyan: var(--color-navy);
  --color-cyan-dim: rgba(29, 53, 87, 0.15);
  --color-cyan-glow: rgba(29, 53, 87, 0.05);
  --color-sand: var(--color-amber);
  --color-titlebar: var(--color-navy);
  --color-text-primary: var(--color-ink);
  --color-text-secondary: var(--color-ink-soft);
  --color-text-tertiary: var(--color-muted);
  --color-rule-light: var(--color-border-light);
  --color-panel: var(--color-white);
  --color-panel-hover: #FAF5ED;
  --color-panel-border: var(--color-border);
  --color-panel-border-bright: var(--color-red);
  --color-surface-glow: rgba(230, 57, 70, 0.04);
  --color-surface-glass: rgba(245, 240, 232, 0.96);
  --color-surface-elevated: var(--color-white);
  --color-amber-dim: rgba(233, 168, 32, 0.15);
  --color-red-dim: rgba(230, 57, 70, 0.12);
  --color-paper-shadow: rgba(0, 0, 0, 0.08);
  --line-red: var(--color-red);
  --line-blue: var(--color-navy);
  --line-green: var(--color-green);
  --line-gold: var(--color-gold);

  /* Layout */
  --sidebar-width: 240px;
  --max-width-text: 660px;
  --max-width-content: 900px;
  --max-width-wide: 1200px;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 48px;
  --space-12: 64px;
  --space-16: 80px;
  --space-20: 96px;

  /* Sharp, geometric */
  --border-radius: 0px;
  --border-radius-lg: 0px;
  --border-radius-xl: 0px;
  --border-radius-full: 50%;

  /* Shadows */
  --shadow-sm: 2px 2px 0 rgba(0,0,0,0.06);
  --shadow-md: 4px 4px 0 rgba(0,0,0,0.08);
  --shadow-lg: 8px 8px 0 rgba(0,0,0,0.1);
  --shadow-letter: var(--shadow-md);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 120ms ease;
  --transition-base: 200ms ease;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-cream);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  color: var(--color-navy);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

strong {
  color: var(--color-ink);
  font-weight: 700;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 0.4em;
  line-height: 1.05;
  font-family: var(--font-display);
  color: var(--color-ink);
  font-weight: 400;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

p {
  margin: 0 0 1em;
  color: var(--color-ink-soft);
}

ul, ol {
  margin: 0 0 1.2em 1.2em;
  color: var(--color-ink-soft);
}

li {
  margin-bottom: 0.35em;
}

li::marker {
  color: var(--color-red);
}

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-blush);
  border: 1px solid var(--color-border);
  padding: 2px 6px;
  color: var(--color-ink);
}

pre {
  position: relative;
  margin: 1.5rem 0;
  padding: 20px;
  overflow-x: auto;
  background: var(--color-ink);
  color: var(--color-cream);
  font-size: 0.88rem;
  border-left: 4px solid var(--color-red);
}

pre code {
  border: none;
  background: transparent;
  padding: 0;
  color: inherit;
}

blockquote {
  margin: 1.5rem 0;
  padding: 20px 24px;
  background: var(--color-white);
  border-left: 4px solid var(--color-red);
  position: relative;
}

blockquote::before {
  content: none;
}

blockquote p:last-child {
  margin-bottom: 0;
}

/* ---- Utility ---- */
.mb-3 { margin-bottom: var(--space-3); }
.mb-6 { margin-bottom: var(--space-6); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--color-red);
  text-transform: uppercase;
  letter-spacing: 0.15em;
}

/* ============================================
   SITE SHELL — Sidebar + Main
   ============================================ */

.site-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: 1fr auto;
  min-height: 100vh;
}

/* ---- Sidebar (Header) ---- */
.site-header {
  grid-column: 1;
  grid-row: 1 / 3;
  background: var(--color-navy);
  color: var(--color-white);
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow: hidden;
}

/* Diagonal red stripe across sidebar */
.site-header::before {
  content: '';
  position: absolute;
  top: -20%;
  left: -50%;
  width: 200%;
  height: 30px;
  background: var(--color-red);
  transform: rotate(-35deg);
  transform-origin: center center;
  z-index: 1;
  pointer-events: none;
}

.site-header::after {
  content: '';
  position: absolute;
  bottom: 15%;
  left: -50%;
  width: 200%;
  height: 20px;
  background: var(--color-red);
  transform: rotate(-35deg);
  transform-origin: center center;
  z-index: 1;
  pointer-events: none;
}

.header-identity {
  padding: 40px 24px 24px;
  position: relative;
  z-index: 2;
}

.header-identity .site-title {
  font-family: var(--font-display);
  font-size: 42px;
  letter-spacing: 0.05em;
  line-height: 0.9;
  text-transform: uppercase;
  color: var(--color-white);
  text-decoration: none;
  display: block;
  margin: 0;
}

.header-identity .site-title:hover {
  color: var(--color-amber);
}

.header-identity .site-title-sub {
  display: block;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-top: 8px;
}

/* ---- Sidebar Nav ---- */
.site-nav {
  flex: 1;
  padding: 24px 0;
  position: relative;
  z-index: 2;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.site-nav li {
  margin: 0;
}

.site-nav a {
  display: block;
  padding: 14px 24px;
  font-family: var(--font-display);
  font-size: 22px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  border-left: 4px solid transparent;
  transition: all 180ms ease;
  position: relative;
}

.site-nav a:hover {
  color: var(--color-white);
  background: rgba(255,255,255,0.05);
  border-left-color: var(--color-amber);
}

.site-nav a.active {
  color: var(--color-white);
  border-left-color: var(--color-red);
  background: rgba(230, 57, 70, 0.15);
}

.site-nav a.active::before {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 8px solid transparent;
  border-bottom: 8px solid transparent;
  border-right: 8px solid var(--color-cream);
}

.sidebar-footer {
  padding: 24px;
  position: relative;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 10px;
  color: rgba(255,255,255,0.3);
  letter-spacing: 0.05em;
}

/* ---- Main Content Area ---- */
.main-content-area {
  grid-column: 2;
  grid-row: 1;
  min-width: 0;
  padding: 48px clamp(24px, 5vw, 64px);
}

/* ---- AI Design Banner ---- */
.ai-design-banner {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 16px;
  background: var(--color-white);
  border-left: 4px solid var(--color-red);
  margin-bottom: 40px;
}

.ai-design-banner span {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--color-ink-soft);
}

.ai-design-banner a {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-red);
}

.ai-design-banner a:hover {
  color: var(--color-red-dark);
}

/* ---- Footer ---- */
.site-footer {
  grid-column: 2;
  grid-row: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px clamp(24px, 5vw, 64px);
  border-top: 2px solid var(--color-ink);
  margin-top: 48px;
}

.footer-tagline {
  font-family: var(--font-display);
  font-size: 18px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink);
  margin: 0;
}

.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.footer-links li {
  margin: 0;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-ink);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.footer-links a:hover {
  background: var(--color-red);
  border-color: var(--color-red);
  color: var(--color-white);
}

.footer-copy {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-muted);
}

/* ---- Mobile Nav Toggle ---- */
.nav-toggle {
  display: none;
  position: fixed;
  bottom: 20px;
  left: 20px;
  z-index: 200;
  background: var(--color-navy);
  color: var(--color-white);
  border: none;
  width: 56px;
  height: 56px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-fast);
}

.nav-toggle:active {
  transform: scale(0.95);
}

.nav-toggle-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  font-size: 0;
}

.nav-toggle-icon::before {
  content: '';
  display: block;
  width: 24px;
  height: 3px;
  background: var(--color-white);
  box-shadow: 0 7px 0 var(--color-white), 0 14px 0 var(--color-white);
}

/* ---- Content Wrappers ---- */
.content-wrapper,
.content-wrapper-narrow {
  width: 100%;
  margin: 0 auto;
  padding: var(--space-10) 0;
}

.content-wrapper {
  max-width: var(--max-width-content);
}

.content-wrapper-narrow {
  max-width: var(--max-width-text);
}

/* ---- Panel Component ---- */
.panel {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  padding: 0;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.panel:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
}

.panel-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--color-ink);
  margin: 0;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.panel-indicator {
  width: 8px;
  height: 8px;
  flex-shrink: 0;
  border-radius: 50%;
}

.panel-indicator-cyan,
.panel-indicator-green {
  background: var(--color-green);
}

.panel-indicator-amber {
  background: var(--color-amber);
}

.panel-action {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--color-red);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.panel-body {
  padding: 16px;
}

/* ---- Link Utilities ---- */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--color-red);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.link-arrow::after {
  content: '\2192';
}

.link-arrow:hover {
  color: var(--color-red-dark);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-red);
  color: var(--color-white);
  padding: 10px 24px;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background var(--transition-fast);
}

.button:hover {
  background: var(--color-red-dark);
  color: var(--color-white);
}

.button-secondary {
  background: var(--color-navy);
}

.button-secondary:hover {
  background: var(--color-navy-light);
}

.divider {
  height: 2px;
  border: none;
  background: var(--color-ink);
  margin: var(--space-10) 0;
}

/* ---- Post Layout ---- */
.post {
  max-width: var(--max-width-content);
  margin: 0 auto;
}

.post::before {
  content: none;
}

.post-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 3px solid var(--color-ink);
  position: relative;
}

.post-header::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 80px;
  height: 3px;
  background: var(--color-red);
}

.post-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 6vw, 64px);
  line-height: 0.95;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-ink);
  margin: 0 0 12px;
}

.post-description {
  margin: 0 0 12px;
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 300;
  color: var(--color-ink-soft);
  line-height: 1.5;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 16px;
}

.post-content {
  font-size: 1.05rem;
  line-height: 1.8;
  max-width: var(--max-width-text);
  color: var(--color-ink-soft);
}

.post-content h2 {
  font-family: var(--font-display);
  font-size: 32px;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px solid var(--color-border);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.post-content h3 {
  font-family: var(--font-display);
  font-size: 24px;
  margin-top: 2rem;
  text-transform: uppercase;
}

.post-content img {
  margin: 2rem 0;
  border: 1px solid var(--color-border);
}

.post-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 2px solid var(--color-ink);
}

.post-footer-text {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ---- Book List Items ---- */
.book-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  transition: padding-left var(--transition-fast);
}

.book-item:hover {
  padding-left: 8px;
  border-bottom-color: var(--color-red);
}

.book-item:last-child {
  border-bottom: none;
}

.book-listing-main {
  min-width: 0;
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.book-title-link {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
}

.book-title-link:hover {
  color: var(--color-red);
}

.book-title {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
}

.note-icon {
  font-size: 9px;
  vertical-align: super;
  color: var(--color-red);
}

.book-author {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 300;
  color: var(--color-muted);
}

.book-rating {
  flex-shrink: 0;
  font-size: 14px;
  color: var(--color-amber);
  white-space: nowrap;
}

.book-rating .stars {
  letter-spacing: 0.05em;
}

.book-rating .currently-reading {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-green);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.book-rating .unrated-text {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-muted);
  text-transform: uppercase;
}

/* ---- Code Copy Button ---- */
.code-copy-button {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--color-red);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 10px;
  cursor: pointer;
  opacity: 0;
  border: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: opacity var(--transition-fast);
}

pre:hover .code-copy-button {
  opacity: 1;
}

.code-copy-button:hover {
  background: var(--color-red-dark);
}

/* ---- Animations ---- */
.animate-in {
  animation: constructSlideIn 400ms var(--ease-out) both;
}

.delay-1,
.animate-in-delay-1 {
  animation-delay: 80ms;
}

.delay-2 {
  animation-delay: 160ms;
}

.delay-3 {
  animation-delay: 240ms;
}

.reveal-ready[data-reveal] {
  opacity: 0;
  transform: translateX(-16px);
  transition: opacity 400ms ease, transform 400ms var(--ease-out);
}

.reveal-ready[data-reveal].is-visible {
  opacity: 1;
  transform: translateX(0);
}

@keyframes constructSlideIn {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.status-dot {
  width: 8px;
  height: 8px;
  background: var(--color-green);
  border-radius: 50%;
  display: inline-block;
}

.keyboard-nav *:focus {
  outline: 2px solid var(--color-red);
  outline-offset: 2px;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 900px) {
  .site-shell {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
  }

  .site-header {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100vh;
    grid-column: 1;
    grid-row: 1;
    transition: left 250ms var(--ease-out);
    box-shadow: none;
    z-index: 300;
  }

  body.nav-open .site-header {
    left: 0;
    box-shadow: 100vw 0 0 rgba(0,0,0,0.4);
  }

  .main-content-area {
    grid-column: 1;
    grid-row: 2;
    padding: 24px 16px;
    padding-top: 24px;
  }

  .site-footer {
    grid-column: 1;
    grid-row: 3;
    padding: 16px;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: flex;
  }

  .ai-design-banner {
    margin-bottom: 24px;
  }
}

@media (max-width: 640px) {
  html {
    font-size: 15px;
  }

  .main-content-area {
    padding: 16px 12px;
  }

  .ai-design-banner {
    flex-direction: column;
    gap: 4px;
    padding: 8px 12px;
  }

  .footer-links {
    display: none;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .post-title {
    font-size: 32px;
  }
}