/* ============================================================
   VIETNAM WAR DIARIES — GLOBAL STYLESHEET
   Dark Academic | Archival | Editorial
   Import this into every page:
   <link rel="stylesheet" href="style.css" />
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:ital,wght@0,400;0,500;0,600;0,700;1,400;1,500&family=Cinzel:wght@400;600;700&family=Source+Code+Pro:wght@400;500&display=swap');

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --bg:           #0c0d0f;
  --bg-surface:   #111318;
  --bg-card:      #13161c;
  --bg-raised:    #181c24;
  --border:       rgba(180, 148, 80, 0.12);
  --border-hover: rgba(180, 148, 80, 0.35);
  --accent:       #b49350;
  --accent-light: #d4b070;
  --accent-dim:   rgba(180, 148, 80, 0.15);
  --text:         #ddd5c0;
  --text-muted:   #7a7060;
  --text-faint:   #4a4438;
  --red-dim:      rgba(160, 60, 50, 0.18);
  --radius-sm:    6px;
  --radius:       10px;
  --radius-lg:    16px;
  --shadow:       0 4px 24px rgba(0,0,0,0.5);
  --shadow-card:  0 2px 12px rgba(0,0,0,0.4);
  --font-display: 'Cinzel', Georgia, serif;
  --font-body:    'EB Garamond', Georgia, serif;
  --font-mono:    'Source Code Pro', monospace;
  --transition:   0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 17px;
}

body {
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 900px 500px at 60% 0%, rgba(180,148,80,0.04) 0%, transparent 70%),
    radial-gradient(ellipse 600px 400px at 0% 80%, rgba(100,60,40,0.05) 0%, transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='300' height='300' filter='url(%23n)' opacity='0.025'/%3E%3C/svg%3E");
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img { max-width: 100%; display: block; }
a  { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-light); }

/* ── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.3;
  color: var(--accent-light);
}
h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); }
h4 { font-size: 1.1rem; color: var(--text); }

p  { margin-bottom: 1.2em; }
em { font-style: italic; color: var(--accent-light); }

blockquote {
  border-left: 3px solid var(--accent);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: var(--accent-dim);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--text-muted);
  font-size: 1.05rem;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2rem 0;
}

/* ── Site Header / Nav ──────────────────────────────────────── */
.site-header {
  width: 100%;
  background: rgba(12,13,15,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 0 2rem;
}

.header-inner {
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 2rem;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-mark {
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #1a1408, #2c2010);
  border: 1px solid var(--border-hover);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent-light);
  line-height: 1.2;
}
.logo-sub {
  font-family: var(--font-body);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav a {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.site-nav a:hover,
.site-nav a.active {
  color: var(--accent-light);
  background: var(--accent-dim);
}

.nav-divider {
  width: 1px;
  height: 18px;
  background: var(--border);
  margin: 0 6px;
}

/* ── Page Wrapper ───────────────────────────────────────────── */
.page-wrapper {
  flex: 1;
  width: 100%;
  max-width: 1160px;
  margin: 0 auto;
  padding: 2.5rem 2rem;
}

/* ── Hero Banner (homepage) ─────────────────────────────────── */
.hero {
  position: relative;
  padding: 4rem 0 3rem;
  margin-bottom: 3rem;
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 80px,
      rgba(180,148,80,0.015) 80px,
      rgba(180,148,80,0.015) 81px
    );
  pointer-events: none;
}

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 32px;
  height: 1px;
  background: var(--accent);
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.15;
  max-width: 740px;
  margin-bottom: 1.2rem;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Buttons ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  transition: all var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #8a6e38);
  color: #0c0d0f;
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  color: #0c0d0f;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(180,148,80,0.25);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--border-hover);
  color: var(--accent-light);
  background: var(--accent-dim);
}

/* ── Cards ──────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.4rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.card:hover::before { opacity: 1; }

.card-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--accent-light);
  line-height: 1.3;
}
.card-title a {
  color: inherit;
}
.card-title a:hover { color: #e8c882; }

.card-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  display: flex;
  justify-content: space-between;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.6rem;
}

.card-excerpt {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  flex: 1;
}

.card-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 3px;
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--border);
}

/* ── Entry Grid ─────────────────────────────────────────────── */
.entry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 1.5rem;
}

/* ── Sidebar ────────────────────────────────────────────────── */
.sidebar {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  position: sticky;
  top: 84px;
}

.sidebar-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

/* ── Form Controls ──────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 1rem; }

.form-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
}

input[type="search"],
input[type="text"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  outline: none;
  appearance: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--border-hover);
  box-shadow: 0 0 0 3px rgba(180,148,80,0.08);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237a7060' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

textarea { min-height: 120px; resize: vertical; line-height: 1.7; }

/* ── Section Headers ────────────────────────────────────────── */
.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 0.25rem;
}

/* ── Diary / Article Page Layout ────────────────────────────── */
.diary-layout {
  max-width: 760px;
  margin: 0 auto;
  padding: 2rem 0;
}

.diary-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.diary-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 0.75rem;
}

.diary-title {
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  line-height: 1.2;
  margin-bottom: 1rem;
}

.diary-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-faint);
  letter-spacing: 0.06em;
}

.diary-meta-item strong {
  font-weight: 500;
  color: var(--text-muted);
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 2px;
}

.diary-body {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text);
}

.diary-body p:first-child::first-letter {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--accent);
  float: left;
  line-height: 0.85;
  margin: 0.05em 0.08em 0 0;
}

/* ── Empty State ────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-faint);
  font-style: italic;
  font-size: 0.95rem;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg-surface);
}

/* ── Timeline component ─────────────────────────────────────── */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0; top: 8px; bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--accent), transparent);
}
.timeline-item {
  position: relative;
  padding-bottom: 2rem;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.4rem;
  top: 6px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 3px rgba(180,148,80,0.2);
}
.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 0.4rem;
}

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer {
  width: 100%;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  margin-top: auto;
  padding: 3rem 2rem 1.5rem;
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
}

.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  max-width: 280px;
  line-height: 1.65;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 0.75rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent-light); }

.footer-bottom {
  padding-top: 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-faint);
  letter-spacing: 0.06em;
}

.footer-note {
  font-size: 0.78rem;
  color: var(--text-faint);
  font-style: italic;
}

/* ── Utility Classes ────────────────────────────────────────── */
.text-accent   { color: var(--accent); }
.text-muted    { color: var(--text-muted); }
.text-faint    { color: var(--text-faint); }
.font-display  { font-family: var(--font-display); }
.font-mono     { font-family: var(--font-mono); }
.text-center   { text-align: center; }
.mt-1  { margin-top: 0.5rem; }
.mt-2  { margin-top: 1rem; }
.mt-3  { margin-top: 1.5rem; }
.mt-4  { margin-top: 2rem; }
.mb-1  { margin-bottom: 0.5rem; }
.mb-2  { margin-bottom: 1rem; }
.mb-3  { margin-bottom: 1.5rem; }
.mb-4  { margin-bottom: 2rem; }

/* ── Fade-in animation (staggered page load) ────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-up {
  animation: fadeUp 0.55s ease both;
}
.fade-up-1 { animation-delay: 0.05s; }
.fade-up-2 { animation-delay: 0.15s; }
.fade-up-3 { animation-delay: 0.25s; }
.fade-up-4 { animation-delay: 0.35s; }
.fade-up-5 { animation-delay: 0.45s; }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  /* Collapse sidebar + main grid to single column */
  .page-wrapper > div[style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
  }

  /* Sidebar stops being sticky, sits above content naturally */
  .sidebar {
    position: relative;
    top: auto;
  }
}

@media (max-width: 768px) {
  html { font-size: 16px; }
  .page-wrapper { padding: 1.5rem 1rem; }
  .site-header  { padding: 0 1rem; }
  .hero         { padding: 2rem 0 1.5rem; }
  .footer-grid  { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
  .nav-divider  { display: none; }

  /* Shrink and scroll nav on small screens */
  .site-nav {
    overflow-x: auto;
    gap: 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .site-nav::-webkit-scrollbar { display: none; }
  .site-nav a {
    padding: 6px 10px;
    font-size: 0.65rem;
    white-space: nowrap;
  }

  /* Hero text tighter on mobile */
  .hero h1       { font-size: clamp(1.6rem, 7vw, 2.4rem); }
  .hero-desc     { font-size: 1rem; }
  .hero-actions  { flex-direction: column; gap: 8px; }
  .hero-actions .btn { justify-content: center; }

  /* Logo text wrapping */
  .logo-text { font-size: 0.85rem; }
  .logo-sub  { display: none; }
}

@media (max-width: 540px) {
  .footer-grid         { grid-template-columns: 1fr; }
  .footer-bottom       { flex-direction: column; text-align: center; }
  .header-inner        { height: 56px; }
  .entry-grid          { grid-template-columns: 1fr; }
  .logo-mark           { width: 34px; height: 34px; font-size: 11px; }
  .diary-layout        { padding: 1rem 0; }
  .diary-meta          { flex-direction: column; gap: 0.75rem; }
}