/* ============================================
   RESET & VARIABLES
   ============================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --gold: #C47F17;
  --gold-bright: #D4911D;
  --gold-vivid: #E8A832;
  --gold-light: #F5DCA0;
  --gold-wash: #FBF0D9;
  --gold-bg: #FDF8F0;

  --ink: #1C1917;
  --text: #292524;
  --text-secondary: #78716C;
  --text-tertiary: #A8A29E;

  --surface: #FAFAF9;
  --card: #FFFFFF;
  --border: #E7E5E4;
  --border-light: #F5F5F4;

  --radius: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(28,25,23,0.04);
  --shadow: 0 4px 20px rgba(28,25,23,0.06);
  --shadow-lg: 0 12px 48px rgba(28,25,23,0.08);
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--surface);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-print-color-adjust: exact;
  print-color-adjust: exact;
}

a { color: var(--gold); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--gold-bright); }

/* ============================================
   LAYOUT
   ============================================ */
.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 32px;
}

/* ============================================
   TOP BAR
   ============================================ */
.top-bar {
  height: 3px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold-vivid) 40%, var(--gold-light) 100%);
}

/* ============================================
   NAV
   ============================================ */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250,250,249,0.88);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
}

nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo { height: 26px; width: auto; }

.nav-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-tertiary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  padding: 88px 0 72px;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 15% 60%, rgba(196,127,23,0.07) 0%, transparent 50%),
    radial-gradient(ellipse at 75% 20%, rgba(232,168,50,0.05) 0%, transparent 45%),
    linear-gradient(175deg, var(--gold-bg) 0%, var(--surface) 55%);
}

.hero .container {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px 7px 12px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 28px;
  box-shadow: var(--shadow-sm);
}

.hero-badge .dot {
  width: 7px;
  height: 7px;
  background: var(--gold);
  border-radius: 50%;
  flex-shrink: 0;
}

.hero h1 {
  font-family: 'Inter', sans-serif;
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 800;
  line-height: 1.0;
  color: var(--ink);
  letter-spacing: -0.035em;
  margin-bottom: 24px;
  max-width: 600px;
}

.hero h1 em {
  font-style: normal;
  color: var(--gold);
}

.hero-subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 520px;
  font-weight: 400;
}

/* PCB trace decoration */
.hero-circuit {
  position: absolute;
  right: -20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  pointer-events: none;
}

@media (max-width: 768px) {
  .hero-circuit { display: none; }
}

/* ============================================
   SECTION DIVIDER
   ============================================ */
.divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 8px 0;
  max-width: 160px;
  margin: 0 auto;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--gold-light);
}

.divider .node {
  width: 6px;
  height: 6px;
  background: var(--gold);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ============================================
   SECTIONS
   ============================================ */
section {
  padding: 64px 0;
}

.section-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-title {
  font-family: 'Inter', sans-serif;
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* ============================================
   OVERVIEW
   ============================================ */
.overview {
  padding-top: 48px;
}

.overview-text {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  max-width: 680px;
}

.overview-text + .overview-text {
  margin-top: 16px;
}

/* ============================================
   TIMELINE
   ============================================ */
.timeline {
  margin-top: 40px;
  position: relative;
}

.timeline-item {
  display: flex;
  gap: 28px;
  position: relative;
  padding-bottom: 40px;
}

.timeline-item:last-child { padding-bottom: 0; }

/* Vertical connector line */
.timeline-item:not(:last-child) .timeline-marker::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 48px;
  bottom: -40px;
  width: 2px;
  background: linear-gradient(to bottom, var(--gold-light), var(--border-light));
  transform: translateX(-50%);
}

.timeline-marker {
  position: relative;
  flex-shrink: 0;
  width: 48px;
  display: flex;
  justify-content: center;
  padding-top: 2px;
}

.timeline-node {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 700;
  color: var(--gold);
  background: var(--card);
  border: 2px solid var(--gold-light);
  box-shadow: 0 2px 8px rgba(196,127,23,0.1);
  position: relative;
  z-index: 2;
}

.timeline-node.offer {
  background: var(--gold);
  color: var(--card);
  border-color: var(--gold);
}

.timeline-card {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.timeline-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.timeline-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.timeline-card h3 {
  font-family: 'Inter', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.duration-badge {
  flex-shrink: 0;
  padding: 4px 12px;
  background: var(--gold-wash);
  color: var(--gold);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 100px;
  white-space: nowrap;
}

.timeline-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.timeline-card.offer-card {
  background: linear-gradient(135deg, var(--gold-bg), var(--gold-wash));
  border-color: var(--gold-light);
}

/* ============================================
   CALLOUT CARDS
   ============================================ */
.callout-section {
  padding: 40px 0;
}

.callout-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--gold);
  border-radius: 4px var(--radius) var(--radius) 4px;
  padding: 36px 40px;
  box-shadow: var(--shadow);
}

.callout-card + .callout-card {
  margin-top: 24px;
}

.callout-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--gold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.callout-card h3 {
  font-family: 'Inter', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.callout-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 12px;
}

.callout-card p:last-child { margin-bottom: 0; }

.callout-list {
  list-style: none;
  margin: 20px 0;
}

.callout-list li {
  display: flex;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 15px;
  color: var(--text);
  line-height: 1.6;
}

.callout-list li:last-child { border-bottom: none; }

.callout-list li strong {
  color: var(--ink);
  font-weight: 600;
}

.callout-list .list-marker {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border-radius: 4px;
  background: var(--gold-wash);
  display: flex;
  align-items: center;
  justify-content: center;
}

.callout-list .list-marker svg {
  width: 12px;
  height: 12px;
  color: var(--gold);
}

.resource-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  padding: 10px 20px;
  background: var(--gold);
  color: white !important;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  transition: background 0.2s, transform 0.2s;
}

.resource-link:hover {
  background: var(--gold-bright);
  color: white !important;
  transform: translateY(-1px);
}

.resource-link svg {
  width: 14px;
  height: 14px;
}

/* ============================================
   PREP GRID
   ============================================ */
.prep-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 36px;
}

@media (max-width: 640px) {
  .prep-grid { grid-template-columns: 1fr; }
}

.prep-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s, transform 0.3s;
}

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

.prep-number {
  font-family: 'Inter', sans-serif;
  font-size: 36px;
  font-weight: 800;
  color: var(--gold-light);
  line-height: 1;
  margin-bottom: 12px;
}

.prep-item h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.prep-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================
   TIPS GRID
   ============================================ */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 36px;
}

@media (max-width: 640px) {
  .tips-grid { grid-template-columns: 1fr; }
}

.tip-card {
  display: flex;
  gap: 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s, transform 0.3s;
}

.tip-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.tip-number {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--gold-wash);
  color: var(--gold);
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tip-content h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}

.tip-content p {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Full-width tip */
.tip-card.full {
  grid-column: 1 / -1;
}

/* ============================================
   RESOURCES
   ============================================ */
.resources-section {
  background: linear-gradient(180deg, var(--surface) 0%, var(--gold-bg) 100%);
}

.resource-grid {
  display: grid;
  gap: 12px;
  margin-top: 32px;
}

.resource-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: box-shadow 0.3s, transform 0.3s, border-color 0.3s;
}

.resource-item:hover {
  box-shadow: var(--shadow);
  transform: translateY(-1px);
  border-color: var(--gold-light);
}

.resource-info h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 2px;
}

.resource-info p {
  font-size: 13px;
  color: var(--text-secondary);
}

.resource-arrow {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--gold-wash);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.resource-item:hover .resource-arrow {
  background: var(--gold);
}

.resource-arrow svg {
  width: 14px;
  height: 14px;
  color: var(--gold);
  transition: color 0.2s;
}

.resource-item:hover .resource-arrow svg {
  color: white;
}

/* ============================================
   VALUES
   ============================================ */
.values-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 36px;
}

@media (max-width: 640px) {
  .values-grid { grid-template-columns: 1fr; }
}

.value-item {
  display: flex;
  gap: 18px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s, transform 0.3s;
}

.value-item:hover {
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.value-number {
  flex-shrink: 0;
  font-family: 'Inter', sans-serif;
  font-size: 28px;
  font-weight: 800;
  color: var(--gold-light);
  line-height: 1;
  letter-spacing: -0.03em;
}

.value-content h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}

.value-content p {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ============================================
   CLOSING MESSAGE
   ============================================ */
.closing {
  text-align: center;
  padding: 48px 0 24px;
}

.closing-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow);
  max-width: 640px;
  margin: 0 auto;
}

.closing-card h3 {
  font-family: 'Inter', sans-serif;
  font-size: 24px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 12px;
}

.closing-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ============================================
   FOOTER
   ============================================ */
footer {
  padding: 40px 0;
  text-align: center;
}

footer img { height: 22px; margin-bottom: 12px; opacity: 0.5; }

footer p {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }
.reveal-delay-5 { transition-delay: 0.40s; }
.reveal-delay-6 { transition-delay: 0.48s; }

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
  .top-bar { height: 4px; }
  nav { position: static; backdrop-filter: none; background: var(--surface); }
  .hero { padding: 48px 0 36px; }
  .hero-circuit { display: none; }
  section { padding: 36px 0; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  .timeline-card:hover,
  .prep-item:hover,
  .tip-card:hover,
  .resource-item:hover { transform: none; box-shadow: var(--shadow-sm); }
  .callout-section { padding: 24px 0; }
  .timeline-item { page-break-inside: avoid; }
  .prep-item, .tip-card { page-break-inside: avoid; }
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 640px) {
  .container { padding: 0 20px; }
  .hero { padding: 56px 0 48px; }
  .timeline-item { gap: 16px; }
  .timeline-card { padding: 20px; }
  .callout-card { padding: 24px; }
  .closing-card { padding: 32px 24px; }
  .timeline-card-header { flex-direction: column; gap: 8px; }
}

/* ============================================
   LANDING PAGE
   ============================================ */
.landing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 40px;
}

@media (max-width: 640px) {
  .landing-grid { grid-template-columns: 1fr; }
}

.role-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 28px 32px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s, transform 0.3s, border-color 0.3s;
  text-decoration: none;
  color: inherit;
}

.role-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  border-color: var(--gold-light);
  color: inherit;
}

.role-card-content h3 {
  font-family: 'Inter', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.role-card-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.role-card .resource-arrow {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gold-wash);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.role-card:hover .resource-arrow {
  background: var(--gold);
}

.role-card .resource-arrow svg {
  width: 16px;
  height: 16px;
  color: var(--gold);
  transition: color 0.2s;
}

.role-card:hover .resource-arrow svg {
  color: white;
}

.landing-grid .role-card.full {
  grid-column: 1 / -1;
}