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

:root {
  --bg:         #0d0f14;
  --surface:    #13161d;
  --surface-2:  #1a1e27;
  --border:     #232733;
  --border-2:   #2c3142;

  --text-primary:   #e8eaf0;
  --text-secondary: #8b92a8;
  --text-muted:     #555e78;

  --accent:     #4f8ef7;
  --accent-dim: rgba(79, 142, 247, 0.12);
  --green:      #3ecf8e;
  --green-dim:  rgba(62, 207, 142, 0.1);
  --orange:     #f59e0b;
  --orange-dim: rgba(245, 158, 11, 0.1);
  --purple:     #818cf8;
  --purple-dim: rgba(129, 140, 248, 0.1);
  --red:        #f87171;
  --red-dim:    rgba(248, 113, 113, 0.1);
  --teal:       #22d3ee;
  --teal-dim:   rgba(34, 211, 238, 0.1);

  --radius-sm:  6px;
  --radius:     10px;
  --radius-lg:  14px;

  --font-mono:  'JetBrains Mono', 'Courier New', monospace;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text-primary);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
}

.header-inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
}
.header-logo svg { stroke: var(--accent); }

.header-meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.tag {
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 999px;
  border: 1px solid;
  letter-spacing: 0.03em;
}
.tag-ai      { color: var(--accent);  border-color: var(--accent);  background: var(--accent-dim); }
.tag-phases  { color: var(--green);   border-color: var(--green);   background: var(--green-dim); }
.tag-bounty  { color: var(--orange);  border-color: var(--orange);  background: var(--orange-dim); }

/* ============================================================
   TITLE BLOCK
   ============================================================ */
.title-block {
  padding: 64px 0 40px;
  border-bottom: 1px solid var(--border);
}

.title-eyebrow {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  font-family: var(--font-mono);
}

.title-block h1 {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 16px;
}

.accent { color: var(--accent); }

.title-desc {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.7;
  max-width: 680px;
  margin-bottom: 24px;
}

.title-pills {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.title-pills span {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
}
.title-pills span svg { stroke: var(--accent); flex-shrink: 0; }

/* ============================================================
   REGISTER BUTTON
   ============================================================ */
.title-cta {
  margin-top: 28px;
}

.btn-register {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, #3ecf8e 0%, #22d3ee 100%);
  color: #0d1117;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 12px 26px;
  border-radius: 999px;
  text-decoration: none;
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
  box-shadow: 0 0 20px rgba(62, 207, 142, 0.35), 0 4px 16px rgba(0,0,0,0.3);
}

.btn-register:hover {
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 0 32px rgba(62, 207, 142, 0.55), 0 6px 24px rgba(0,0,0,0.35);
  opacity: 0.95;
}

.btn-register:active {
  transform: translateY(0) scale(0.98);
}

.btn-register-header {
  font-size: 12px;
  padding: 7px 16px;
  box-shadow: 0 0 12px rgba(62, 207, 142, 0.25);
}

/* ============================================================
   OBJECTIVE BLOCK
   ============================================================ */
.objective-block {
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
}

.objective-card {
  background: var(--accent-dim);
  border: 1px solid rgba(79,142,247,0.2);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: flex-start;
}

.obj-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(79,142,247,0.3);
  border-radius: 4px;
  padding: 2px 8px;
  white-space: nowrap;
  margin-top: 3px;
  font-family: var(--font-mono);
}

.objective-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  flex: 1;
  min-width: 280px;
}
.objective-card p strong { color: var(--text-primary); }

/* ============================================================
   CURRICULUM
   ============================================================ */
.curriculum { padding: 40px 0 80px; }

/* ============================================================
   PHASE BLOCK
   ============================================================ */
.phase-block {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--surface);
  margin-bottom: 20px;
  overflow: hidden;
  position: relative;
  transition: border-color 0.2s;
}
.phase-block:hover { border-color: var(--border-2); }

/* Phase header */
.phase-header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.phase-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 999px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Per-phase colours */
.phase-hdr-0 .phase-badge { background: var(--purple-dim); color: var(--purple); border: 1px solid rgba(129,140,248,0.25); }
.phase-hdr-1 .phase-badge { background: var(--accent-dim); color: var(--accent);  border: 1px solid rgba(79,142,247,0.25); }
.phase-hdr-2 .phase-badge { background: var(--green-dim);  color: var(--green);   border: 1px solid rgba(62,207,142,0.25); }
.phase-hdr-3 .phase-badge { background: var(--orange-dim); color: var(--orange);  border: 1px solid rgba(245,158,11,0.25); }
.phase-hdr-4 .phase-badge { background: var(--teal-dim);   color: var(--teal);    border: 1px solid rgba(34,211,238,0.25); }
.phase-hdr-5 .phase-badge { background: var(--red-dim);    color: var(--red);     border: 1px solid rgba(248,113,113,0.25); }
.phase-hdr-6 .phase-badge { background: var(--red-dim);    color: var(--red);     border: 1px solid rgba(248,113,113,0.25); }
.phase-hdr-7 .phase-badge { background: var(--purple-dim); color: var(--purple);  border: 1px solid rgba(129,140,248,0.25); }
.phase-hdr-8 .phase-badge { background: var(--green-dim);  color: var(--green);   border: 1px solid rgba(62,207,142,0.25); }
.phase-hdr-9 .phase-badge { background: var(--accent-dim); color: var(--accent);  border: 1px solid rgba(79,142,247,0.25); }

/* icon colours per phase */
.phase-hdr-0 .phase-icon { color: var(--purple); }
.phase-hdr-1 .phase-icon { color: var(--accent); }
.phase-hdr-2 .phase-icon { color: var(--green); }
.phase-hdr-3 .phase-icon { color: var(--orange); }
.phase-hdr-4 .phase-icon { color: var(--teal); }
.phase-hdr-5 .phase-icon { color: var(--red); }
.phase-hdr-6 .phase-icon { color: var(--red); }
.phase-hdr-7 .phase-icon { color: var(--purple); }
.phase-hdr-8 .phase-icon { color: var(--green); }
.phase-hdr-9 .phase-icon { color: var(--accent); }

.phase-title-group { flex: 1; }

.phase-title-group h2 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.3;
}

.phase-sub {
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.phase-icon {
  display: flex;
  align-items: center;
  opacity: 0.7;
  flex-shrink: 0;
}

/* Phase body */
.phase-body {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ============================================================
   FEATURED PHASE (SaaS)
   ============================================================ */
.phase-featured {
  border-color: rgba(248,113,113,0.25);
  background: linear-gradient(135deg, rgba(248,113,113,0.04) 0%, var(--surface) 60%);
}

.featured-ribbon {
  position: absolute;
  top: 18px;
  right: -28px;
  background: var(--red);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 40px;
  transform: rotate(45deg);
  transform-origin: center;
}

/* ============================================================
   MODULE
   ============================================================ */
.module {
  border-left: 2px solid var(--border-2);
  padding-left: 18px;
}

.module-num {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.module h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

/* ============================================================
   TOPIC LIST
   ============================================================ */
.topic-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.topic-list li {
  color: var(--text-secondary);
  font-size: 13.5px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}

.topic-list li::before {
  content: '—';
  color: var(--border-2);
  flex-shrink: 0;
  margin-top: 1px;
  font-family: var(--font-mono);
}

/* ============================================================
   TOOLS ROW
   ============================================================ */
.tools-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.tools-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-family: var(--font-mono);
  padding-top: 3px;
  white-space: nowrap;
}

.tool-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.tool-tags span {
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  color: var(--text-secondary);
  font-size: 12px;
  font-family: var(--font-mono);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  transition: border-color 0.15s, color 0.15s;
}
.tool-tags span:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ============================================================
   PRACTICAL BLOCK
   ============================================================ */
.practical-block {
  margin-top: 14px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
}

.practical-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--green);
  font-family: var(--font-mono);
  margin-bottom: 8px;
}

/* ============================================================
   PROJECT PILLS
   ============================================================ */
.project-pills {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.project-pills span {
  background: var(--green-dim);
  border: 1px solid rgba(62,207,142,0.2);
  color: var(--green);
  font-size: 12px;
  font-family: var(--font-mono);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
}

/* ============================================================
   TWO-COLUMN LAYOUT (OS Mastery)
   ============================================================ */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 580px) { .two-col { grid-template-columns: 1fr; } }

.col-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-family: var(--font-mono);
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border);
}

/* ============================================================
   VULN GRID (OWASP)
   ============================================================ */
.vuln-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 14px;
}
@media (max-width: 520px) { .vuln-grid { grid-template-columns: 1fr; } }

.vuln-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.vuln-num {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--teal);
  background: var(--teal-dim);
  padding: 1px 6px;
  border-radius: 4px;
  flex-shrink: 0;
}

/* ============================================================
   SAAS GRID
   ============================================================ */
.saas-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 580px) { .saas-grid { grid-template-columns: 1fr; } }

.saas-item {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
  transition: border-color 0.15s;
}
.saas-item:hover { border-color: rgba(248,113,113,0.3); }

.saas-icon {
  width: 30px;
  height: 30px;
  background: var(--red-dim);
  border: 1px solid rgba(248,113,113,0.2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--red);
}

.saas-item strong {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 3px;
}

.saas-item p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

/* ============================================================
   CAPSTONE SECTION
   ============================================================ */
.capstone-section {
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 28px 24px;
  margin-bottom: 20px;
}

.capstone-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 24px;
  color: var(--orange);
}

.capstone-header h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.capstone-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
@media (max-width: 640px) { .capstone-grid { grid-template-columns: 1fr; } }

.capstone-card {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  transition: border-color 0.15s;
}
.capstone-card:hover { border-color: var(--orange); }

.capstone-track-num {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--orange);
  margin-bottom: 6px;
}

.capstone-card h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

/* ============================================================
   OUTCOMES SECTION
   ============================================================ */
.outcomes-section {
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  background: var(--surface);
  padding: 28px 24px;
}

.outcomes-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  color: var(--green);
}

.outcomes-header h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.outcomes-intro {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 20px;
}

.outcomes-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
@media (max-width: 580px) { .outcomes-list { grid-template-columns: 1fr; } }

.outcome-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.outcome-check {
  width: 22px;
  height: 22px;
  background: var(--green-dim);
  border: 1px solid rgba(62,207,142,0.25);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
  color: var(--green);
}

/* ============================================================
   SITE FOOTER
   ============================================================ */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--accent);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 4px;
}
.footer-logo svg { stroke: var(--accent); }

.site-footer p {
  font-size: 12px;
  color: var(--text-muted);
  max-width: 480px;
}

.footer-copy {
  margin-top: 8px;
  color: var(--text-muted) !important;
}

/* ============================================================
   SCROLLBAR
   ============================================================ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 640px) {
  .title-block { padding: 40px 0 28px; }
  .phase-header { padding: 14px 16px; }
  .phase-body { padding: 16px; }
  .phase-title-group h2 { font-size: 15px; }
  .capstone-section, .outcomes-section { padding: 20px 16px; }
}