/* ==========================================================================
   Pentest Pilot — Landing Page Stylesheet
   Dark Cybersecurity Theme | Pure CSS3
   ========================================================================== */

/* ── Variables ─────────────────────────────────────────────────────────── */
:root {
  --bg-primary:      #050816;
  --bg-secondary:    #0a0f1e;
  --bg-card:         #0f172a;
  --bg-card-hover:   #131c31;
  --bg-glass:        rgba(15, 23, 42, 0.7);

  --blue-primary:    #2563eb;
  --blue-secondary:  #3b82f6;
  --blue-accent:     #38bdf8;
  --blue-glow:       rgba(37, 99, 235, 0.35);
  --blue-glow-soft:  rgba(56, 189, 248, 0.15);

  --success:         #22c55e;
  --warning:         #f59e0b;
  --danger:          #ef4444;

  --text-primary:    #f8fafc;
  --text-secondary:  #cbd5e1;
  --text-muted:      #64748b;

  --border:          rgba(56, 189, 248, 0.12);
  --border-hover:    rgba(56, 189, 248, 0.35);

  --radius-sm:       6px;
  --radius:          12px;
  --radius-lg:       18px;
  --radius-xl:       24px;

  --shadow-card:     0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow:     0 0 40px var(--blue-glow);
  --shadow-glow-sm:  0 0 20px var(--blue-glow);

  --transition:      0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  --font-main:  'Inter', 'Manrope', system-ui, sans-serif;
  --nav-height: 72px;
}

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

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

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
ul, ol { list-style: none; }

/* ── Loading Screen ─────────────────────────────────────────────────────── */
#loading-screen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

#loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-logo {
  display: flex;
  align-items: center;
  gap: 14px;
  animation: pulse-logo 1.5s ease-in-out infinite;
}

.loading-logo svg { width: 52px; height: 52px; }

.loading-logo span {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--blue-accent), var(--blue-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.loading-bar {
  width: 220px;
  height: 3px;
  background: var(--border);
  border-radius: 99px;
  overflow: hidden;
}

.loading-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--blue-primary), var(--blue-accent));
  border-radius: 99px;
  animation: loading-progress 1s ease forwards;
}

.loading-text {
  font-size: 0.85rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

@keyframes loading-progress {
  from { width: 0; }
  to   { width: 100%; }
}

@keyframes pulse-logo {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.8; transform: scale(0.98); }
}

/* ── Navigation ─────────────────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  padding: 0 5%;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
  border-bottom: 1px solid transparent;
}

#navbar.scrolled {
  background: rgba(5, 8, 22, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.4);
}

.nav-container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-logo svg { width: 36px; height: 36px; }

.nav-logo-text {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.3px;
  background: linear-gradient(135deg, #f8fafc 0%, var(--blue-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  flex: 1;
  justify-content: center;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
  padding-bottom: 2px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--blue-accent);
  transition: width var(--transition);
  border-radius: 99px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 6px;
  cursor: pointer;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 99px;
  transition: var(--transition);
}

.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav drawer */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(5, 8, 22, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 24px 5%;
  flex-direction: column;
  gap: 20px;
  z-index: 999;
  transform: translateY(-8px);
  opacity: 0;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-mobile.open {
  display: flex;
  transform: translateY(0);
  opacity: 1;
}

.nav-mobile a {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
}

.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a:hover { color: var(--blue-accent); }

/* ── Buttons ─────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0;
  transition: opacity var(--transition);
}

.btn:hover::before { opacity: 1; }

.btn-primary {
  background: linear-gradient(135deg, var(--blue-primary), var(--blue-secondary));
  color: #fff;
  box-shadow: 0 4px 16px var(--blue-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--blue-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-hover);
}

.btn-secondary:hover {
  border-color: var(--blue-accent);
  color: var(--blue-accent);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  padding: 8px 18px;
  font-size: 0.85rem;
}

.btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

.btn-sm {
  padding: 7px 16px;
  font-size: 0.82rem;
}

/* ── Hero ────────────────────────────────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-height) + 60px) 5% 80px;
  overflow: hidden;
}

#hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 99px;
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.25);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--blue-accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 28px;
}

.hero-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--blue-accent);
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

.hero-title {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -1.5px;
  margin-bottom: 24px;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--blue-accent) 0%, var(--blue-primary) 60%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 40px;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 72px;
}

/* ── Stats ───────────────────────────────────────────────────────────────── */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 40px;
  border-right: 1px solid var(--border);
}

.stat-item:last-child { border-right: none; }

.stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 6px;
}

.stat-value span {
  color: var(--blue-accent);
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Sections ────────────────────────────────────────────────────────────── */
section {
  padding: 100px 5%;
}

.section-container {
  max-width: 1280px;
  margin: 0 auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--blue-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

.section-tag::before {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--blue-accent);
  border-radius: 99px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -0.8px;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

.section-header {
  margin-bottom: 64px;
}

/* ── Cards ───────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(37,99,235,0.05) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card), var(--shadow-glow-sm);
}

.card:hover::before { opacity: 1; }

/* ── Features ────────────────────────────────────────────────────────────── */
#features {
  background: var(--bg-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--blue-primary), var(--blue-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card), 0 0 30px var(--blue-glow);
}

.feature-card:hover::after { transform: scaleX(1); }

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(37,99,235,0.2), rgba(56,189,248,0.1));
  border: 1px solid rgba(56,189,248,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-icon svg { width: 24px; height: 24px; color: var(--blue-accent); }

.feature-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── Architecture ────────────────────────────────────────────────────────── */
#architecture {
  overflow: hidden;
}

.arch-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  max-width: 640px;
  margin: 0 auto;
}

.arch-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  width: 100%;
}

.arch-node {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 28px;
  text-align: center;
  min-width: 180px;
  transition: var(--transition);
  position: relative;
}

.arch-node:hover {
  border-color: var(--blue-accent);
  box-shadow: 0 0 24px var(--blue-glow);
  transform: scale(1.04);
}

.arch-node-label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.arch-node.highlight {
  border-color: rgba(37,99,235,0.5);
  background: linear-gradient(135deg, rgba(37,99,235,0.15), var(--bg-card));
}

.arch-node.highlight .arch-node-label { color: var(--blue-accent); }

.arch-arrow {
  display: flex;
  justify-content: center;
  padding: 6px 0;
  color: var(--blue-primary);
  opacity: 0.6;
}

.arch-arrow svg {
  width: 20px;
  height: 20px;
  animation: arrow-bounce 2s ease-in-out infinite;
}

@keyframes arrow-bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(4px); }
}

.arch-row-multi {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.arch-line {
  width: 2px;
  height: 32px;
  background: linear-gradient(180deg, var(--blue-primary), transparent);
  margin: 0 auto;
  border-radius: 99px;
}

/* ── Scanners ─────────────────────────────────────────────────────────────── */
#scanners {
  background: var(--bg-secondary);
}

.scanners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}

.scanner-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.scanner-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-5px) scale(1.01);
  box-shadow: var(--shadow-card), 0 0 28px var(--blue-glow);
}

.scanner-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.scanner-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(37,99,235,0.2), rgba(56,189,248,0.08));
  border: 1px solid rgba(56,189,248,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.badge {
  padding: 3px 10px;
  border-radius: 99px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-stable   { background: rgba(34,197,94,0.15);  color: #22c55e; border: 1px solid rgba(34,197,94,0.25); }
.badge-beta     { background: rgba(245,158,11,0.15); color: #f59e0b; border: 1px solid rgba(245,158,11,0.25); }
.badge-planned  { background: rgba(100,116,139,0.15); color: #94a3b8; border: 1px solid rgba(100,116,139,0.25); }
.badge-soon     { background: rgba(168,85,247,0.15); color: #a855f7; border: 1px solid rgba(168,85,247,0.25); }

.scanner-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.scanner-category {
  font-size: 0.75rem;
  color: var(--blue-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.scanner-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.scanners-future-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.scanners-future-title::before,
.scanners-future-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.future-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.future-tag {
  padding: 6px 14px;
  border-radius: 99px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: var(--transition);
}

.future-tag:hover {
  border-color: var(--border-hover);
  color: var(--text-secondary);
}

/* ── Roadmap ─────────────────────────────────────────────────────────────── */
#roadmap {
  overflow: hidden;
}

.roadmap-timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.roadmap-timeline::before {
  content: '';
  position: absolute;
  left: 24px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--blue-primary), var(--bg-primary));
}

.roadmap-item {
  display: flex;
  gap: 28px;
  padding: 0 0 40px;
  position: relative;
}

.roadmap-dot {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  border: 2px solid;
  font-size: 1.1rem;
}

.roadmap-dot.completed {
  background: rgba(34,197,94,0.15);
  border-color: #22c55e;
}

.roadmap-dot.in-progress {
  background: rgba(37,99,235,0.2);
  border-color: var(--blue-primary);
  animation: ring-pulse 2s ease-in-out infinite;
}

.roadmap-dot.planned {
  background: rgba(100,116,139,0.1);
  border-color: #475569;
}

@keyframes ring-pulse {
  0%   { box-shadow: 0 0 0 0 rgba(37,99,235,0.4); }
  70%  { box-shadow: 0 0 0 10px rgba(37,99,235,0); }
  100% { box-shadow: 0 0 0 0 rgba(37,99,235,0); }
}

.roadmap-content {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  flex: 1;
  transition: var(--transition);
}

.roadmap-content:hover {
  border-color: var(--border-hover);
  transform: translateX(4px);
}

.roadmap-status {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.roadmap-status.completed { color: #22c55e; }
.roadmap-status.in-progress { color: var(--blue-accent); }
.roadmap-status.planned { color: var(--text-muted); }

.roadmap-title {
  font-size: 1.02rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.roadmap-desc {
  font-size: 0.87rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ── Testimonials ────────────────────────────────────────────────────────── */
#testimonials {
  background: var(--bg-secondary);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
  transition: var(--transition);
}

.testimonial-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.testimonial-quote {
  font-size: 2.5rem;
  line-height: 1;
  color: var(--blue-primary);
  opacity: 0.4;
  margin-bottom: 14px;
  font-family: Georgia, serif;
}

.testimonial-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 24px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}

.testimonial-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-primary), var(--blue-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
  flex-shrink: 0;
}

.testimonial-name {
  font-size: 0.92rem;
  font-weight: 700;
}

.testimonial-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ── FAQ ──────────────────────────────────────────────────────────────────── */
#faq {
  overflow: hidden;
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item.open {
  border-color: rgba(56,189,248,0.3);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: color var(--transition);
}

.faq-question:hover { color: var(--blue-accent); }

.faq-chevron {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform var(--transition);
}

.faq-item.open .faq-chevron { transform: rotate(180deg); color: var(--blue-accent); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.75;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* ── CTA ──────────────────────────────────────────────────────────────────── */
#cta {
  padding: 100px 5%;
  text-align: center;
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

#cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 600px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37,99,235,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.cta-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 16px;
}

.cta-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ── Contact ─────────────────────────────────────────────────────────────── */
#contact {
  overflow: hidden;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  max-width: 800px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.contact-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.contact-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(37,99,235,0.2), rgba(56,189,248,0.08));
  border: 1px solid rgba(56,189,248,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-icon svg { width: 22px; height: 22px; color: var(--blue-accent); }

.contact-card-title {
  font-size: 0.95rem;
  font-weight: 700;
}

.contact-card-value {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ── Footer ──────────────────────────────────────────────────────────────── */
footer {
  padding: 60px 5% 36px;
  border-top: 1px solid var(--border);
  background: var(--bg-primary);
}

.footer-container {
  max-width: 1280px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-logo svg { width: 32px; height: 32px; }

.footer-logo-text {
  font-size: 1.15rem;
  font-weight: 800;
  background: linear-gradient(135deg, #f8fafc 0%, var(--blue-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-tagline {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-col-title {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--blue-accent); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copy {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: 20px;
}

.footer-version {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 99px;
}

/* ── Registration Modal ──────────────────────────────────────────────────── */
#modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(5, 8, 22, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

#modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--bg-card);
  border: 1px solid rgba(56,189,248,0.2);
  border-radius: var(--radius-xl);
  padding: 40px;
  width: 100%;
  max-width: 480px;
  position: relative;
  transform: scale(0.92) translateY(20px);
  transition: transform var(--transition), opacity var(--transition);
  box-shadow: 0 24px 80px rgba(0,0,0,0.6), 0 0 60px rgba(37,99,235,0.15);
}

#modal-overlay.open .modal {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.1rem;
  line-height: 1;
}

.modal-close:hover {
  background: rgba(239,68,68,0.1);
  border-color: rgba(239,68,68,0.4);
  color: #ef4444;
}

.modal-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.modal-logo svg { width: 32px; height: 32px; }

.modal-logo-text {
  font-size: 1.1rem;
  font-weight: 800;
  background: linear-gradient(135deg, #f8fafc 0%, var(--blue-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.4px;
  margin-bottom: 8px;
}

.modal-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.6;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.form-label .required {
  color: var(--danger);
  margin-left: 3px;
}

.form-input {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-size: 0.95rem;
  color: var(--text-primary);
  font-family: var(--font-main);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-input::placeholder { color: var(--text-muted); }

.form-input:focus {
  border-color: var(--blue-primary);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.2);
}

.form-input.error {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(239,68,68,0.15);
}

.form-input.success {
  border-color: var(--success);
}

.form-error {
  display: none;
  font-size: 0.8rem;
  color: var(--danger);
  margin-top: 6px;
}

.form-error.visible { display: block; }

/* Honeypot — hidden from humans, visible to bots */
.hp-field { display: none; }

.checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 28px;
}

.checkbox-input {
  width: 18px;
  height: 18px;
  accent-color: var(--blue-primary);
  flex-shrink: 0;
  margin-top: 2px;
  cursor: pointer;
}

.checkbox-label {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  cursor: pointer;
}

.checkbox-label a {
  color: var(--blue-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.modal-submit {
  width: 100%;
  padding: 14px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--blue-primary), var(--blue-secondary));
  color: #fff;
  font-size: 0.98rem;
  font-weight: 700;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: var(--transition);
  box-shadow: 0 4px 20px var(--blue-glow);
}

.modal-submit:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--blue-glow);
}

.modal-submit:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

/* Spinner */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Modal states */
.modal-state { display: none; }
.modal-state.active { display: block; }

/* Success state */
.modal-success {
  text-align: center;
  padding: 20px 0 10px;
}

.success-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(34,197,94,0.12);
  border: 2px solid #22c55e;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  animation: success-pop 0.5s cubic-bezier(0.34,1.56,0.64,1);
}

@keyframes success-pop {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

.success-icon svg { width: 36px; height: 36px; color: #22c55e; }

.success-title {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.success-text {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Failure state */
.modal-failure {
  text-align: center;
  padding: 20px 0 10px;
}

.failure-icon {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: rgba(239,68,68,0.12);
  border: 2px solid #ef4444;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.failure-icon svg { width: 36px; height: 36px; color: #ef4444; }

.failure-title {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 10px;
}

.failure-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}

.failure-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
}

/* ── Back To Top ─────────────────────────────────────────────────────────── */
#back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 800;
  width: 44px;
  height: 44px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--blue-primary), var(--blue-secondary));
  border: none;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
  box-shadow: 0 4px 16px var(--blue-glow);
}

#back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px var(--blue-glow);
}

#back-to-top svg { width: 18px; height: 18px; }

/* ── Animations ──────────────────────────────────────────────────────────── */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.4,0,0.2,1), transform 0.7s cubic-bezier(0.4,0,0.2,1);
}

.animate-on-scroll.from-left  { transform: translateX(-28px); }
.animate-on-scroll.from-right { transform: translateX(28px); }
.animate-on-scroll.zoom       { transform: scale(0.92); }

.animate-on-scroll.visible {
  opacity: 1;
  transform: translate(0) scale(1);
}

[data-delay="100"] { transition-delay: 0.1s; }
[data-delay="150"] { transition-delay: 0.15s; }
[data-delay="200"] { transition-delay: 0.2s; }
[data-delay="250"] { transition-delay: 0.25s; }
[data-delay="300"] { transition-delay: 0.3s; }
[data-delay="350"] { transition-delay: 0.35s; }
[data-delay="400"] { transition-delay: 0.4s; }
[data-delay="500"] { transition-delay: 0.5s; }
[data-delay="600"] { transition-delay: 0.6s; }
[data-delay="700"] { transition-delay: 0.7s; }

/* ── Utility ─────────────────────────────────────────────────────────────── */
.text-accent { color: var(--blue-accent); }
.text-muted  { color: var(--text-muted); }

/* Visually-hidden (accessibility) */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  section { padding: 72px 5%; }

  .nav-links { display: none; }
  .nav-actions .btn:not(.btn-primary) { display: none; }
  .hamburger { display: flex; }

  .hero-stats {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .stat-item {
    padding: 14px 24px;
    border-right: none;
    border-bottom: 1px solid var(--border);
    width: 50%;
  }

  .stat-item:nth-child(odd) { border-right: 1px solid var(--border); }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .modal { padding: 28px 20px; }
  .modal-title { font-size: 1.3rem; }

  #back-to-top { bottom: 20px; right: 20px; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  .stat-item { width: 100%; border-right: none; }

  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; justify-content: center; }

  .failure-actions { flex-direction: column; }
}

/* ── Focus / Accessibility ───────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--blue-accent);
  outline-offset: 3px;
}

/* High-contrast bump */
@media (prefers-contrast: high) {
  :root {
    --border:       rgba(56,189,248,0.3);
    --border-hover: rgba(56,189,248,0.6);
    --text-secondary: #e2e8f0;
  }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .animate-on-scroll { opacity: 1; transform: none; }
}