/* ==========================================================================
   CS 499 ePortfolio | Christopher Prempeh
   Amber + Navy design system matching the code review deck.
   ========================================================================== */

:root {
  --navy-900: #0d1f33;
  --navy-800: #12273f;
  --navy-700: #1a3550;
  --slate-500: #64748b;
  --slate-400: #94a3b8;
  --slate-300: #cbd5e1;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --panel:    #f5f8fa;
  --bg:       #ffffff;
  --amber:    #f59e0b;
  --amber-dark: #b47308;
  --green:    #2ead6d;
  --text:     #1a3550;
  --text-muted: #475569;
  --ff-display: 'Raleway', system-ui, -apple-system, sans-serif;
  --ff-body:    'Inter', system-ui, -apple-system, sans-serif;
  --ff-mono:    'JetBrains Mono', 'Menlo', monospace;
  --maxw: 1100px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 70px; }

body {
  margin: 0;
  font-family: var(--ff-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--amber-dark); text-decoration: none; transition: color .15s; }
a:hover { color: var(--amber); text-decoration: underline; text-underline-offset: 3px; }

code {
  font-family: var(--ff-mono);
  font-size: 0.92em;
  background: var(--slate-100);
  padding: 2px 6px;
  border-radius: 3px;
  color: var(--navy-700);
}

/* ==========================================================================
   TOP NAVIGATION
   ========================================================================== */

.topnav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(13, 31, 51, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(245, 158, 11, 0.2);
}

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-inner .brand {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 15px;
  color: #fff;
  letter-spacing: -0.01em;
}
.nav-inner .brand:hover { color: var(--amber); text-decoration: none; }

.topnav ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}

.topnav li a {
  color: var(--slate-300);
  font-size: 14px;
  font-weight: 500;
}
.topnav li a:hover { color: var(--amber); text-decoration: none; }

/* ==========================================================================
   HERO
   ========================================================================== */

.hero {
  position: relative;
  background: var(--navy-900);
  color: #fff;
  overflow: hidden;
  padding: 120px 24px 140px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 6px;
  height: 100%;
  background: var(--amber);
}

.hero-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.eyebrow {
  color: var(--amber);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 28px 0;
}

.hero h1 {
  font-family: var(--ff-display);
  font-size: clamp(56px, 9vw, 108px);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin: 0 0 32px 0;
  color: #fff;
}

.lede {
  font-size: clamp(18px, 2vw, 22px);
  max-width: 680px;
  color: var(--slate-300);
  line-height: 1.45;
  margin: 0 0 40px 0;
}

.hero-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--slate-400);
  padding-top: 28px;
  border-top: 1px solid rgba(255,255,255,0.1);
  max-width: 680px;
}

.hero-accent {
  position: absolute;
  right: -200px;
  top: -100px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.12) 0%, transparent 65%);
  pointer-events: none;
  z-index: 1;
}

/* ==========================================================================
   SECTIONS (shared)
   ========================================================================== */

.section {
  padding: 96px 24px;
  border-bottom: 1px solid var(--slate-200);
}

.section-inner {
  max-width: var(--maxw);
  margin: 0 auto;
}

.section-dark {
  background: var(--panel);
}

.section-header {
  margin-bottom: 56px;
  max-width: 760px;
}

.section-num {
  display: inline-block;
  font-family: var(--ff-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--amber-dark);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.section-header h2 {
  font-family: var(--ff-display);
  font-size: clamp(34px, 4.5vw, 52px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 20px 0;
  color: var(--navy-900);
}

.section-sub {
  font-size: 18px;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
  max-width: 620px;
}

/* ==========================================================================
   PROSE (narrative content)
   ========================================================================== */

.prose {
  max-width: 720px;
  font-size: 17px;
  line-height: 1.7;
  color: var(--text);
}

.prose p {
  margin: 0 0 22px 0;
}

.prose p:first-child::first-letter {
  font-family: var(--ff-display);
  font-weight: 800;
  font-size: 3.8em;
  float: left;
  line-height: 0.85;
  margin: 6px 12px 0 0;
  color: var(--amber);
}

.inline-download {
  margin-top: 40px;
  padding-top: 28px;
  border-top: 2px solid var(--amber);
  max-width: 720px;
}

.inline-download a {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--amber-dark);
}

/* ==========================================================================
   CODE REVIEW / VIDEO
   ========================================================================== */

.video-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--navy-900);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(13, 31, 51, 0.25);
  margin-bottom: 20px;
}

.video-wrap iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.video-meta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--text-muted);
}
.video-meta a { font-weight: 600; }

/* ==========================================================================
   ARTIFACT CARDS
   ========================================================================== */

.artifact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 760px) {
  .artifact-grid { grid-template-columns: 1fr; }
}

.artifact-card {
  background: var(--bg);
  border: 1px solid var(--slate-200);
  border-radius: 8px;
  padding: 32px;
  transition: transform .2s, box-shadow .2s;
}

.artifact-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(13, 31, 51, 0.08);
}

.artifact-card-primary {
  border: 2px solid var(--amber);
  background: linear-gradient(180deg, #fffbf2 0%, #fff 100%);
}

.card-label {
  font-family: var(--ff-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--amber-dark);
  margin: 0 0 12px 0;
}

.artifact-card h3 {
  font-family: var(--ff-display);
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 16px 0;
  color: var(--navy-900);
}

.artifact-card p {
  margin: 0 0 24px 0;
  color: var(--text-muted);
  line-height: 1.55;
}

.card-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
}

/* ==========================================================================
   ENHANCEMENTS INDEX
   ========================================================================== */

.enhance-index {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.enhance-index a {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 24px 28px;
  background: var(--bg);
  border: 1px solid var(--slate-200);
  border-left: 4px solid var(--amber);
  border-radius: 6px;
  transition: all .2s;
  color: var(--text);
  text-decoration: none;
}

.enhance-index a:hover {
  background: var(--navy-900);
  color: #fff;
  border-left-color: var(--amber);
  transform: translateX(4px);
}

.enhance-index span {
  font-family: var(--ff-mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--amber-dark);
  flex-shrink: 0;
}

.enhance-index a:hover span { color: var(--amber); }

.enhance-index strong {
  display: block;
  font-family: var(--ff-display);
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--navy-900);
}
.enhance-index a:hover strong { color: #fff; }

.enhance-index em {
  display: block;
  font-style: normal;
  font-size: 14px;
  color: var(--text-muted);
}
.enhance-index a:hover em { color: var(--slate-300); }

/* ==========================================================================
   ENHANCEMENT SECTIONS
   ========================================================================== */

.section-enh {
  background: var(--bg);
}

.section-enh + .section-enh {
  border-top: 1px solid var(--slate-200);
}

.enh-header {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  margin-bottom: 48px;
  padding-bottom: 28px;
  border-bottom: 2px solid var(--amber);
}

.enh-num {
  font-family: var(--ff-display);
  font-size: clamp(56px, 8vw, 88px);
  font-weight: 800;
  line-height: 1;
  color: var(--amber);
  flex-shrink: 0;
}

.enh-category {
  font-family: var(--ff-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber-dark);
  margin: 8px 0 12px 0;
}

.enh-header h2 {
  font-family: var(--ff-display);
  font-size: clamp(32px, 4.5vw, 48px);
  font-weight: 800;
  margin: 0;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--navy-900);
}

.enh-body {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 56px;
  align-items: start;
}

@media (max-width: 900px) {
  .enh-body { grid-template-columns: 1fr; gap: 40px; }
}

.enh-aside {
  position: sticky;
  top: 90px;
  background: var(--navy-900);
  color: #fff;
  padding: 28px;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.55;
}

.aside-label {
  font-family: var(--ff-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 16px 0;
}

.enh-aside ul {
  list-style: none;
  margin: 0 0 24px 0;
  padding: 0;
}

.enh-aside li {
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  color: var(--slate-300);
}
.enh-aside li:last-child { border-bottom: 0; }

.enh-aside strong {
  color: #fff;
  display: block;
  margin-bottom: 2px;
  font-weight: 600;
}

.enh-aside code {
  background: rgba(245, 158, 11, 0.12);
  color: var(--amber);
  font-size: 0.85em;
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 20px;
  border-top: 2px solid var(--amber);
}

.aside-links a {
  color: #fff;
  font-weight: 600;
  font-size: 13px;
}
.aside-links a:hover { color: var(--amber); text-decoration: none; }

/* ==========================================================================
   OUTCOMES TABLE
   ========================================================================== */

.outcomes-table {
  border: 1px solid var(--slate-200);
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg);
}

.outcomes-table .row {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  padding: 18px 24px;
  border-bottom: 1px solid var(--slate-200);
  gap: 24px;
  font-size: 15px;
  line-height: 1.5;
}

.outcomes-table .row:last-child { border-bottom: 0; }
.outcomes-table .row:nth-child(even):not(.head) { background: var(--slate-100); }

.outcomes-table .row.head {
  background: var(--navy-900);
  color: var(--amber);
  font-family: var(--ff-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

@media (max-width: 660px) {
  .outcomes-table .row { grid-template-columns: 1fr; gap: 6px; }
}

/* ==========================================================================
   DOWNLOADS
   ========================================================================== */

.downloads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
}

.dl-group h3 {
  font-family: var(--ff-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--amber-dark);
  margin: 0 0 16px 0;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--amber);
}

.dl-group ul {
  list-style: none;
  margin: 0; padding: 0;
}

.dl-group li {
  padding: 10px 0;
  border-bottom: 1px solid var(--slate-200);
}

.dl-group li:last-child { border-bottom: 0; }

.dl-group a {
  font-size: 14px;
  font-weight: 500;
  color: var(--navy-700);
}

.dl-group a:hover { color: var(--amber-dark); }

/* ==========================================================================
   FOOTER
   ========================================================================== */

footer {
  background: var(--navy-900);
  color: var(--slate-300);
  padding: 56px 24px;
  border-top: 4px solid var(--amber);
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  text-align: center;
}

.footer-name {
  font-family: var(--ff-display);
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 8px 0;
}

.footer-meta {
  font-size: 14px;
  color: var(--slate-400);
  margin: 0 0 16px 0;
}

.footer-repo a {
  color: var(--amber);
  font-family: var(--ff-mono);
  font-size: 14px;
}
.footer-repo a:hover { color: #fff; text-decoration: none; }

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

@media (max-width: 600px) {
  .section { padding: 64px 20px; }
  .hero { padding: 80px 20px 100px; }
  .nav-inner ul { display: none; }
  .prose p:first-child::first-letter { font-size: 3em; }
  .enh-header { flex-direction: column; gap: 12px; }
}