/* ==========================================================================
   DEPARTMENT OF ENGLISH - REFINED MINIMALIST EDITORIAL SYSTEM
   Warm tactile paper, precision typography, archival line-work & alignment
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,600&family=Plus+Jakarta+Sans:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Warm Archival Paper Palette */
  --bg-body: #faf7f2;
  --bg-surface: #f4efe6;
  --bg-card: #fdfbf7;
  --bg-subtle: #eee7dc;
  --bg-input: #ffffff;
  
  --ink-primary: #1c1917;
  --ink-secondary: #57534e;
  --ink-muted: #8c827a;
  
  --rule-color: #dfd7ca;
  --rule-dark: #1c1917;
  --rule-accent: #a37036;
  --oxblood: #7c2d27;
  --ivy: #2d4a3e;

  --font-serif: 'Cormorant Garamond', Garamond, 'Georgia', serif;
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --shadow-subtle: 0 2px 8px rgba(28, 25, 23, 0.04), 0 1px 2px rgba(28, 25, 23, 0.02);
  --shadow-lift: 0 8px 24px rgba(28, 25, 23, 0.08);

  --radius: 3px;
  --transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  /* Archival Obsidian Theme */
  --bg-body: #141312;
  --bg-surface: #1b1917;
  --bg-card: #201e1b;
  --bg-subtle: #292622;
  --bg-input: #1a1816;
  
  --ink-primary: #f2eee6;
  --ink-secondary: #b8b0a5;
  --ink-muted: #7d756b;
  
  --rule-color: #332f2a;
  --rule-dark: #e8e2d5;
  --rule-accent: #c4944a;
  --oxblood: #9e3d36;
  --ivy: #3f6857;

  --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-lift: 0 8px 24px rgba(0, 0, 0, 0.5);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--ink-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
  position: relative;
}

/* Subtle Archival Paper Texture Grain */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  pointer-events: none;
  z-index: 999;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5 {
  font-family: var(--font-serif);
  color: var(--ink-primary);
  font-weight: 500;
  line-height: 1.18;
}

h1 {
  font-size: clamp(2.4rem, 4.8vw, 4.4rem);
  letter-spacing: -0.015em;
}

h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.8rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.65rem);
}

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

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

/* Strict Layout Container Alignment */
.container {
  width: 92%;
  max-width: 1180px;
  margin: 0 auto;
  position: relative;
}

/* Double Hairline Vintage Press Rule */
.press-rule {
  border: none;
  border-top: 1px solid var(--rule-color);
  border-bottom: 1px solid var(--rule-color);
  height: 4px;
  margin: 0;
}

/* Site Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--bg-body);
  border-bottom: 1px solid var(--rule-color);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.brand-crest-svg {
  width: 36px;
  height: 36px;
  color: var(--ink-primary);
  flex-shrink: 0;
}

.brand-title-group {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-serif);
  font-size: 1.28rem;
  font-weight: 600;
  color: var(--ink-primary);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  margin-top: 0.15rem;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.8rem;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-secondary);
  position: relative;
  padding: 0.3rem 0;
}

.nav-link:hover {
  color: var(--ink-primary);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--ink-primary);
  transition: width 0.2s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.theme-toggle-btn {
  background: var(--bg-surface);
  border: 1px solid var(--rule-color);
  color: var(--ink-secondary);
  padding: 0.4rem 0.85rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  border-radius: var(--radius);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  border-color: var(--ink-primary);
  color: var(--ink-primary);
}

.auth-header-btn {
  background: var(--bg-surface);
  border: 1px solid var(--rule-color);
  color: var(--ink-primary);
  padding: 0.4rem 0.85rem;
  font-size: 0.78rem;
  font-family: var(--font-mono);
  border-radius: var(--radius);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: var(--transition);
}

.auth-header-btn:hover {
  border-color: var(--ink-primary);
  background: var(--bg-card);
}

.auth-header-btn.logged-in {
  border-color: var(--rule-accent);
  background: var(--bg-surface);
  color: var(--ink-primary);
  font-weight: 500;
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  color: var(--ink-primary);
  cursor: pointer;
}

/* Sections */
.section {
  padding: 5.5rem 0;
  border-bottom: 1px solid var(--rule-color);
  position: relative;
}

.section-header {
  margin-bottom: 3rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  border-bottom: 1px solid var(--rule-color);
  padding-bottom: 1.25rem;
  gap: 1.5rem;
}

.section-numeral {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--rule-accent);
  margin-bottom: 0.4rem;
  display: block;
}

.section-title {
  margin: 0;
}

.section-caption {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--ink-secondary);
  margin-top: 0.35rem;
}

/* Footer */
.site-footer {
  padding: 4.5rem 0 3rem 0;
  background-color: var(--bg-surface);
  border-top: 2px solid var(--rule-color);
  font-size: 0.88rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1.2fr 1.2fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-col h5 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
  margin-bottom: 1.25rem;
  font-weight: 500;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links a {
  color: var(--ink-secondary);
}

.footer-links a:hover {
  color: var(--ink-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--rule-color);
  padding-top: 2rem;
  color: var(--ink-muted);
  font-size: 0.8rem;
  font-family: var(--font-mono);
}

/* Mobile Menu Drawer & Overlay */
@media (max-width: 900px) {
  .header-inner {
    height: 64px;
  }

  .main-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    background-color: var(--bg-card);
    border-bottom: 1px solid var(--rule-color);
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem 1.75rem 2rem 1.75rem;
    gap: 1.2rem;
    box-shadow: var(--shadow-lift);
    z-index: 99;
  }

  .main-nav.mobile-active {
    display: flex;
  }

  .nav-link {
    font-size: 1rem;
    border-bottom: 1px solid var(--rule-color);
    padding: 0.5rem 0;
  }

  .mobile-menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius);
    border: 1px solid var(--rule-color);
  }

  .section {
    padding: 3.5rem 0;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 2rem;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.25rem;
  }
}

@media (max-width: 580px) {
  .container {
    width: 92%;
    padding: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    text-align: center;
  }

  .brand-title {
    font-size: 1.15rem;
  }
}