/* ================================================================
   THE ENGINEERS CLUB — Design System & Styles
   ================================================================ */

/* ----------------------------------------------------------------
   1. DESIGN TOKENS
   ---------------------------------------------------------------- */
:root {
  /* Core palette */
  --clr-bg:          #060b18;
  --clr-surface:     #0c1525;
  --clr-surface-2:   #111d30;
  --clr-surface-3:   #16243d;

  /* Brand */
  --clr-primary:     #4f8ef7;
  --clr-primary-h:   #6fa4ff;
  --clr-primary-dim: rgba(79, 142, 247, 0.12);
  --clr-accent:      #22d3ee;
  --clr-accent-dim:  rgba(34, 211, 238, 0.1);

  /* Status */
  --clr-green:       #34d399;
  --clr-amber:       #fbbf24;
  --clr-red:         #f87171;

  /* Text */
  --clr-text:        #e8eeff;
  --clr-text-2:      #9aaec8;
  --clr-text-3:      #5a7099;

  /* Borders */
  --clr-border:      rgba(99, 140, 210, 0.12);
  --clr-border-2:    rgba(99, 140, 210, 0.2);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace;

  /* Scale */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.25rem;
  --text-2xl:  1.5rem;
  --text-3xl:  1.875rem;
  --text-4xl:  2.25rem;
  --text-5xl:  3rem;
  --text-6xl:  3.75rem;
  --text-7xl:  4.5rem;

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.5), 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 8px 32px rgba(0,0,0,0.6);
  --shadow-xl:  0 20px 60px rgba(0,0,0,0.7);
  --shadow-glow: 0 0 40px rgba(79,142,247,0.15);
  --shadow-glow-cyan: 0 0 40px rgba(34,211,238,0.1);

  /* Transitions */
  --ease-out:   cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:    cubic-bezier(0.4, 0, 1, 1);
  --ease:       cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration:      250ms;
  --duration-slow: 450ms;

  /* Layout */
  --max-w:    1200px;
  --max-w-sm: 680px;
  --nav-h:    68px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 1rem);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--clr-text);
  background-color: var(--clr-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Import Inter from system / Google Fonts fallback */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

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

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

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

.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.text-gradient {
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.section {
  padding-block: var(--space-24);
}

.section--alt {
  background: linear-gradient(180deg, transparent 0%, rgba(12,21,37,0.6) 10%, rgba(12,21,37,0.6) 90%, transparent 100%);
  position: relative;
}

.section-header {
  text-align: center;
  max-width: var(--max-w-sm);
  margin-inline: auto;
  margin-bottom: var(--space-16);
}

.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-primary);
  margin-bottom: var(--space-4);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--clr-primary-dim);
  border-radius: var(--radius-full);
  background: var(--clr-primary-dim);
}

.section-title {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--clr-text);
  margin-bottom: var(--space-5);
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--clr-text-2);
  line-height: 1.7;
  text-align: center;
}

/* ----------------------------------------------------------------
   4. REVEAL ANIMATIONS
   ---------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
  transition-delay: var(--delay, 0ms);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
.reveal-delay-1 { --delay: 120ms; }
.reveal-delay-2 { --delay: 240ms; }
.reveal-delay-3 { --delay: 360ms; }

/* ----------------------------------------------------------------
   5. BUTTONS
   ---------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: var(--radius-full);
  transition: all var(--duration) var(--ease);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  -webkit-user-select: none;
  user-select: none;
}
.btn:focus-visible {
  outline: 2px solid var(--clr-primary);
  outline-offset: 3px;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--duration-fast);
  border-radius: inherit;
}
.btn:hover::after { background: rgba(255,255,255,0.06); }
.btn:active::after { background: rgba(255,255,255,0.12); }

.btn-sm  { padding: var(--space-2) var(--space-5); font-size: var(--text-xs); }
.btn-md  { padding: var(--space-3) var(--space-6); }
.btn-lg  { padding: 0.7rem var(--space-8); font-size: var(--text-base); }
.btn-xl  { padding: 0.9rem var(--space-10); font-size: var(--text-lg); }

.btn-primary {
  background: linear-gradient(135deg, var(--clr-primary) 0%, #3a7ae8 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(79,142,247,0.35);
}
.btn-primary:hover {
  box-shadow: 0 6px 30px rgba(79,142,247,0.5);
  transform: translateY(-1px);
}
.btn-primary:active { transform: none; }

.btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--clr-text);
  border: 1px solid var(--clr-border-2);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.09);
  border-color: rgba(99,140,210,0.35);
}

.btn-outline {
  background: transparent;
  color: var(--clr-primary);
  border: 1.5px solid var(--clr-primary);
}
.btn-outline:hover {
  background: var(--clr-primary-dim);
}

.btn-icon {
  flex-shrink: 0;
  transition: transform var(--duration) var(--ease);
}
.btn:hover .btn-icon {
  transform: translateX(3px);
}

/* ----------------------------------------------------------------
   6. NAVIGATION
   ---------------------------------------------------------------- */
.nav-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background var(--duration-slow) var(--ease),
              border-color var(--duration-slow) var(--ease),
              backdrop-filter var(--duration-slow) var(--ease);
}
.nav-header.scrolled {
  background: rgba(6, 11, 24, 0.85);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--clr-border);
}

.nav-inner {
  height: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: -0.01em;
  color: var(--clr-text);
  transition: opacity var(--duration);
  flex-shrink: 0;
}
.nav-logo:hover { opacity: 0.85; }

.logo-mark { flex-shrink: 0; }
.logo-text { font-size: var(--text-sm); font-weight: 700; }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--clr-text-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  transition: color var(--duration), background var(--duration);
}
.nav-link:hover {
  color: var(--clr-text);
  background: rgba(255,255,255,0.05);
}

.nav-cta {
  margin-left: var(--space-3);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  transition: background var(--duration);
}
.nav-toggle:hover { background: rgba(255,255,255,0.05); }
.bar {
  display: block;
  width: 22px; height: 2px;
  background: var(--clr-text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.3s;
}

/* ----------------------------------------------------------------
   7. HERO
   ---------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-h);
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  padding-block: var(--space-24);
}

/* Hero background */
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(79,142,247,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(79,142,247,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 20%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 20%, black 20%, transparent 70%);
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.hero-glow--1 {
  width: 700px; height: 700px;
  top: -200px; left: -100px;
  background: radial-gradient(circle, rgba(79,142,247,0.08) 0%, transparent 70%);
}
.hero-glow--2 {
  width: 500px; height: 500px;
  top: 10%; right: -100px;
  background: radial-gradient(circle, rgba(34,211,238,0.06) 0%, transparent 70%);
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  animation: float 8s ease-in-out infinite;
}
.hero-orb--1 {
  width: 6px; height: 6px;
  top: 30%; left: 15%;
  background: var(--clr-primary);
  box-shadow: 0 0 20px var(--clr-primary);
  animation-delay: -2s;
}
.hero-orb--2 {
  width: 4px; height: 4px;
  top: 60%; right: 20%;
  background: var(--clr-accent);
  box-shadow: 0 0 15px var(--clr-accent);
  animation-delay: -5s;
}

@keyframes float {
  0%, 100% { transform: translateY(0) scale(1); }
  50%       { transform: translateY(-16px) scale(1.1); }
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--clr-text-2);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--clr-border-2);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-4);
  margin-bottom: var(--space-8);
}
.badge-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--clr-green);
  box-shadow: 0 0 8px var(--clr-green);
  animation: pulse-dot 2.5s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.6; transform: scale(0.8); }
}

.hero-title {
  font-size: clamp(var(--text-4xl), 5.5vw, var(--text-7xl));
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--clr-text);
  margin-bottom: var(--space-6);
}

.hero-subtitle {
  font-size: clamp(var(--text-base), 2vw, var(--text-xl));
  color: var(--clr-text-2);
  line-height: 1.7;
  max-width: 480px;
  margin-bottom: var(--space-8);
}

.hero-topics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-10);
}

.topic-tag {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--clr-accent);
  background: var(--clr-accent-dim);
  border: 1px solid rgba(34,211,238,0.2);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
  letter-spacing: 0.02em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-10);
}

.hero-social-proof {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.avatar-stack {
  display: flex;
}
.avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  border: 2px solid var(--clr-bg);
  margin-left: -8px;
  background: var(--clr-surface-3);
}
.avatar:first-child { margin-left: 0; }
.av1 { background: linear-gradient(135deg, #6366f1, #8b5cf6); }
.av2 { background: linear-gradient(135deg, #3b82f6, #06b6d4); }
.av3 { background: linear-gradient(135deg, #10b981, #3b82f6); }
.av4 { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.av5 { background: linear-gradient(135deg, #ec4899, #8b5cf6); }

.social-proof-text {
  font-size: var(--text-sm);
  color: var(--clr-text-2);
}
.social-proof-text strong {
  color: var(--clr-text);
  font-weight: 700;
}

/* ---- Terminal card ---- */
.hero-visual {
  position: relative;
  z-index: 1;
}

.terminal-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border-2);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl), var(--shadow-glow);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-5);
  background: var(--clr-surface-2);
  border-bottom: 1px solid var(--clr-border);
}
.terminal-dot {
  width: 12px; height: 12px;
  border-radius: 50%;
}
.terminal-dot--red    { background: #ff5f57; }
.terminal-dot--yellow { background: #ffbd2e; }
.terminal-dot--green  { background: #28c840; }
.terminal-title {
  margin-left: var(--space-2);
  font-size: var(--text-xs);
  color: var(--clr-text-3);
  font-family: var(--font-sans);
}

.terminal-body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.terminal-line {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  line-height: 1.6;
}
.t-prompt {
  color: var(--clr-accent);
  font-weight: 700;
  flex-shrink: 0;
}
.t-cmd { color: var(--clr-text); }
.t-output {
  color: var(--clr-text-2);
  padding-left: var(--space-4);
}
.t-success { color: var(--clr-green); }
.t-green { color: var(--clr-green); }
.t-dim { color: var(--clr-text-3); }
.t-cursor {
  animation: blink 1.2s step-end infinite;
  color: var(--clr-accent);
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* Floating badges */
.floating-badge {
  position: absolute;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border-2);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-5);
  box-shadow: var(--shadow-md);
  animation: float-badge 6s ease-in-out infinite;
}
.fb-1 {
  bottom: -20px; left: -30px;
  animation-delay: -1s;
}
.fb-2 {
  top: -20px; right: -20px;
  animation-delay: -3.5s;
}
@keyframes float-badge {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}
.fb-icon { font-size: 1.5rem; }
.fb-title { font-size: var(--text-sm); font-weight: 700; color: var(--clr-text); }
.fb-sub   { font-size: var(--text-xs); color: var(--clr-text-2); }

/* Hero scroll indicator */
.hero-scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}
.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--clr-primary));
  margin-inline: auto;
  animation: scroll-pulse 2.5s ease-in-out infinite;
}
@keyframes scroll-pulse {
  0%   { opacity: 0; transform: scaleY(0); transform-origin: top; }
  50%  { opacity: 1; }
  100% { opacity: 0; transform: scaleY(1); transform-origin: top; }
}

/* ----------------------------------------------------------------
   8. LOGO MARQUEE
   ---------------------------------------------------------------- */
.logos-section {
  padding-block: var(--space-12);
  border-block: 1px solid var(--clr-border);
  overflow: hidden;
}
.logos-label {
  text-align: center;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  margin-bottom: var(--space-6);
}
.logos-track {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}
.logos-inner {
  display: flex;
  gap: var(--space-4);
  animation: marquee 28s linear infinite;
  width: max-content;
}
@keyframes marquee {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
.logos-inner:hover { animation-play-state: paused; }
.logo-chip {
  flex-shrink: 0;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--clr-text-2);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  padding: var(--space-2) var(--space-5);
  white-space: nowrap;
  transition: color var(--duration), border-color var(--duration), background var(--duration);
}
.logo-chip:hover {
  color: var(--clr-text);
  border-color: var(--clr-border-2);
  background: var(--clr-surface-2);
}

/* ----------------------------------------------------------------
   9. LEARN CARDS
   ---------------------------------------------------------------- */
.learn-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.learn-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: border-color var(--duration), transform var(--duration), box-shadow var(--duration);
  position: relative;
  overflow: hidden;
}
.learn-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 0%, rgba(79,142,247,0.07) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--duration-slow);
  pointer-events: none;
}
.learn-card:hover {
  border-color: var(--clr-border-2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}
.learn-card:hover::before { opacity: 1; }

.learn-card-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  background: var(--clr-primary-dim);
  border: 1px solid rgba(79,142,247,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-primary);
  margin-bottom: var(--space-5);
}

.learn-card-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.learn-card-desc {
  font-size: var(--text-sm);
  color: var(--clr-text-2);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.learn-card-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.learn-card-list li {
  font-size: var(--text-sm);
  color: var(--clr-text-3);
  padding-left: var(--space-5);
  position: relative;
}
.learn-card-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--clr-primary);
  font-size: var(--text-xs);
}

/* ----------------------------------------------------------------
   10. WHY SECTION
   ---------------------------------------------------------------- */
.why-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-20);
  align-items: center;
}

.why-points {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-8);
}

.why-point {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.why-point-icon {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border-radius: var(--radius-md);
  background: var(--clr-primary-dim);
  border: 1px solid rgba(79,142,247,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-green);
  margin-top: 2px;
}

.why-point strong {
  display: block;
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: var(--space-1);
}
.why-point p {
  font-size: var(--text-sm);
  color: var(--clr-text-2);
  line-height: 1.6;
}

.why-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.stat-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  transition: border-color var(--duration), transform var(--duration);
}
.stat-card:hover {
  border-color: var(--clr-border-2);
  transform: translateY(-3px);
}

.stat-number {
  font-size: var(--text-4xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  line-height: 1;
  margin-bottom: var(--space-2);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--clr-text-2);
  font-weight: 500;
}

/* ----------------------------------------------------------------
   11. ROADMAP
   ---------------------------------------------------------------- */
.roadmap {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  max-width: 820px;
  margin-inline: auto;
}

.roadmap-track {
  position: absolute;
  left: 28px;
  top: 40px;
  bottom: 40px;
  width: 1px;
  background: linear-gradient(to bottom, var(--clr-primary), var(--clr-accent));
  opacity: 0.3;
}

.roadmap-step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--space-6);
  padding-bottom: var(--space-8);
  position: relative;
}
.roadmap-step:last-child { padding-bottom: 0; }

.roadmap-marker {
  position: relative;
  z-index: 1;
}
.roadmap-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-accent) 100%);
  font-size: var(--text-xs);
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.05em;
  box-shadow: 0 0 20px rgba(79,142,247,0.3);
  flex-shrink: 0;
}

.roadmap-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: border-color var(--duration), transform var(--duration);
  align-self: flex-start;
}
.roadmap-card:hover {
  border-color: var(--clr-border-2);
  transform: translateX(4px);
}

.roadmap-phase {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-primary);
  margin-bottom: var(--space-2);
}

.roadmap-card-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.roadmap-card-desc {
  font-size: var(--text-sm);
  color: var(--clr-text-2);
  line-height: 1.7;
  margin-bottom: var(--space-5);
}

.roadmap-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.rtag {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--clr-text-3);
  background: var(--clr-surface-3);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-full);
  padding: 2px var(--space-3);
}

/* ----------------------------------------------------------------
   12. NEWSLETTER
   ---------------------------------------------------------------- */
.newsletter-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-20);
  align-items: start;
}

.newsletter-perks {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}
.newsletter-perks li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--clr-text-2);
}
.perk-icon { font-size: 1.1rem; flex-shrink: 0; }

/* Form */
.newsletter-form { width: 100%; }

.form-row {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}

.form-field { flex: 1; min-width: 200px; }

.form-input {
  width: 100%;
  height: 52px;
  background: var(--clr-surface);
  border: 1.5px solid var(--clr-border-2);
  border-radius: var(--radius-full);
  padding: 0 var(--space-6);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  color: var(--clr-text);
  transition: border-color var(--duration), box-shadow var(--duration);
  outline: none;
}
.form-input::placeholder { color: var(--clr-text-3); }
.form-input:focus {
  border-color: var(--clr-primary);
  box-shadow: 0 0 0 3px rgba(79,142,247,0.15);
}
.form-input.is-invalid {
  border-color: var(--clr-red);
  box-shadow: 0 0 0 3px rgba(248,113,113,0.15);
}
.form-input:-webkit-autofill {
  -webkit-box-shadow: 0 0 0 1000px var(--clr-surface) inset;
  -webkit-text-fill-color: var(--clr-text);
}

.form-submit {
  height: 52px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  flex-shrink: 0;
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--clr-text-3);
  line-height: 1.5;
}
.form-hint-link {
  color: var(--clr-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.form-hint-link:hover { color: var(--clr-primary-h); }

.form-message {
  margin-top: var(--space-4);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
}
.form-message--success {
  background: rgba(52,211,153,0.1);
  border: 1px solid rgba(52,211,153,0.3);
  color: var(--clr-green);
}
.form-message--error {
  background: rgba(248,113,113,0.1);
  border: 1px solid rgba(248,113,113,0.3);
  color: var(--clr-red);
}

/* Substack custom widget override — matches .form-input / .btn-primary */
#custom-substack-embed {
  width: 100%;
}
#custom-substack-embed form {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  width: 100%;
}
#custom-substack-embed input[type="email"] {
  flex: 1;
  min-width: 200px;
  height: 52px;
  background: var(--clr-surface) !important;
  border: 1.5px solid var(--clr-border-2) !important;
  border-radius: var(--radius-full) !important;
  padding: 0 var(--space-6) !important;
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  color: var(--clr-text) !important;
  transition: border-color var(--duration), box-shadow var(--duration);
  outline: none;
  box-sizing: border-box;
}
#custom-substack-embed input[type="email"]::placeholder {
  color: var(--clr-text-3);
}
#custom-substack-embed input[type="email"]:focus {
  border-color: var(--clr-primary) !important;
  box-shadow: 0 0 0 3px rgba(79,142,247,0.15) !important;
}
#custom-substack-embed button[type="submit"] {
  height: 52px;
  padding: 0 var(--space-7);
  border-radius: var(--radius-full) !important;
  background: linear-gradient(135deg, var(--clr-primary) 0%, #3a7ae8 100%) !important;
  color: #fff !important;
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  font-weight: 600;
  border: none !important;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: opacity var(--duration), transform var(--duration);
}
#custom-substack-embed button[type="submit"]:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}
/* Hide Substack's own branding line below the form */
#custom-substack-embed .substack-widget-ctas,
#custom-substack-embed .substack-widget-disclaimer { display: none !important; }

/* Newsletter preview */
.newsletter-preview {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.preview-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  margin-bottom: var(--space-2);
}

.post-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--duration), transform var(--duration);
}
.post-card:hover {
  border-color: var(--clr-border-2);
  transform: translateY(-2px);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.post-tag {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--clr-primary);
  background: var(--clr-primary-dim);
  border: 1px solid rgba(79,142,247,0.2);
  border-radius: var(--radius-full);
  padding: 1px var(--space-3);
}
.post-date {
  font-size: var(--text-xs);
  color: var(--clr-text-3);
}

.post-title {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--clr-text);
  line-height: 1.4;
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.post-excerpt {
  font-size: var(--text-sm);
  color: var(--clr-text-2);
  line-height: 1.65;
  margin-bottom: var(--space-4);
}

.post-read-more {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--clr-primary);
  transition: color var(--duration);
}
.post-read-more:hover { color: var(--clr-primary-h); }

.view-all-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--clr-text-2);
  padding: var(--space-4);
  text-align: center;
  transition: color var(--duration);
}
.view-all-link:hover { color: var(--clr-primary); }

/* ----------------------------------------------------------------
   13. COMMUNITY
   ---------------------------------------------------------------- */
.community-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.community-feature {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: border-color var(--duration), transform var(--duration);
}
.community-feature:hover {
  border-color: var(--clr-border-2);
  transform: translateY(-3px);
}

.cf-icon {
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  background: var(--clr-accent-dim);
  border: 1px solid rgba(34,211,238,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-accent);
  margin-bottom: var(--space-5);
}

.cf-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--clr-text);
  margin-bottom: var(--space-3);
}

.cf-desc {
  font-size: var(--text-sm);
  color: var(--clr-text-2);
  line-height: 1.65;
}

.community-cta-card {
  background: linear-gradient(135deg, var(--clr-surface-2) 0%, var(--clr-surface-3) 100%);
  border: 1px solid var(--clr-border-2);
  border-radius: var(--radius-2xl);
  padding: var(--space-12) var(--space-16);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-10);
  position: relative;
  overflow: hidden;
}
.community-cta-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -100px;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,142,247,0.08) 0%, transparent 70%);
  pointer-events: none;
}

.cta-card-badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-green);
  background: rgba(52,211,153,0.1);
  border: 1px solid rgba(52,211,153,0.25);
  border-radius: var(--radius-full);
  padding: 2px var(--space-3);
  margin-bottom: var(--space-4);
}

.cta-card-title {
  font-size: var(--text-3xl);
  font-weight: 800;
  color: var(--clr-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.cta-card-desc {
  font-size: var(--text-base);
  color: var(--clr-text-2);
  line-height: 1.7;
  max-width: 460px;
  margin-bottom: var(--space-6);
}

.cta-card-social-proof {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-sm);
  color: var(--clr-text-2);
}

/* ----------------------------------------------------------------
   14. TESTIMONIALS
   ---------------------------------------------------------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.testimonial-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color var(--duration), transform var(--duration);
}
.testimonial-card:hover {
  border-color: var(--clr-border-2);
  transform: translateY(-4px);
}

.testimonial-stars {
  color: var(--clr-amber);
  font-size: var(--text-base);
  letter-spacing: 2px;
}

.testimonial-text {
  font-size: var(--text-sm);
  color: var(--clr-text-2);
  line-height: 1.75;
  flex: 1;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: auto;
}

.testimonial-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.av-blue  { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.av-green { background: linear-gradient(135deg, #10b981, #059669); }

.testimonial-name {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--clr-text);
}
.testimonial-role {
  font-size: var(--text-xs);
  color: var(--clr-text-3);
}

/* ----------------------------------------------------------------
   15. CONSULTATION
   ---------------------------------------------------------------- */
.consult-cta-card::before {
  background: radial-gradient(circle, rgba(52,211,153,0.07) 0%, transparent 70%);
}

.consult-cta-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex-shrink: 0;
  align-items: stretch;
  min-width: 220px;
}

/* ----------------------------------------------------------------
   16. FINAL CTA
   ---------------------------------------------------------------- */
.final-cta {
  text-align: center;
}
.final-cta-inner {
  position: relative;
  padding: var(--space-20);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border-2);
  border-radius: var(--radius-2xl);
  overflow: hidden;
}
.cta-glow {
  position: absolute;
  inset: -100px;
  background: radial-gradient(ellipse at center, rgba(79,142,247,0.07) 0%, transparent 65%);
  pointer-events: none;
}
.final-cta-actions {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-10);
}

/* ----------------------------------------------------------------
   16. FOOTER
   ---------------------------------------------------------------- */
.footer {
  border-top: 1px solid var(--clr-border);
  padding-block: var(--space-16) var(--space-10);
  background: var(--clr-surface);
}

.footer-top {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: var(--space-20);
  margin-bottom: var(--space-12);
}

.footer-logo { margin-bottom: var(--space-4); }

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--clr-text-2);
  line-height: 1.65;
  margin-bottom: var(--space-6);
  max-width: 280px;
}

.footer-socials {
  display: flex;
  gap: var(--space-3);
}
.social-link {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-text-2);
  transition: color var(--duration), border-color var(--duration), background var(--duration);
}
.social-link:hover {
  color: var(--clr-text);
  border-color: var(--clr-border-2);
  background: var(--clr-surface-3);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}
.footer-nav-heading {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-text-3);
  margin-bottom: var(--space-5);
}
.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-nav a {
  font-size: var(--text-sm);
  color: var(--clr-text-2);
  transition: color var(--duration);
}
.footer-nav a:hover { color: var(--clr-text); }

.footer-bottom {
  border-top: 1px solid var(--clr-border);
  padding-top: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.footer-copy, .footer-gdpr {
  font-size: var(--text-xs);
  color: var(--clr-text-3);
}

/* ----------------------------------------------------------------
   17. BACK TO TOP
   ---------------------------------------------------------------- */
.back-to-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  z-index: 50;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--clr-surface-2);
  border: 1px solid var(--clr-border-2);
  color: var(--clr-text-2);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--duration), transform var(--duration), color var(--duration), background var(--duration);
  opacity: 0;
  transform: translateY(16px);
  pointer-events: none;
}
.back-to-top.is-visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.back-to-top:hover {
  background: var(--clr-surface-3);
  color: var(--clr-text);
  transform: translateY(-2px);
}
.back-to-top:focus-visible {
  outline: 2px solid var(--clr-primary);
  outline-offset: 3px;
}

/* ----------------------------------------------------------------
   18. RESPONSIVE
   ---------------------------------------------------------------- */

/* Tablet (≤ 1024px) */
@media (max-width: 1024px) {
  :root { --nav-h: 60px; }

  .hero .container {
    grid-template-columns: 1fr;
    gap: var(--space-16);
    text-align: center;
  }
  .hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .hero-subtitle { max-width: 560px; }
  .hero-visual {
    max-width: 480px;
    margin-inline: auto;
  }
  .hero-scroll-indicator { display: none; }

  .learn-grid { grid-template-columns: repeat(2, 1fr); }

  .why-layout {
    grid-template-columns: 1fr;
    gap: var(--space-16);
  }
  .why-stats {
    grid-template-columns: repeat(4, 1fr);
    max-width: 600px;
  }

  .newsletter-layout { grid-template-columns: 1fr; }

  .community-cta-card {
    flex-direction: column;
    text-align: center;
    padding: var(--space-12);
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .testimonials-grid { grid-template-columns: 1fr 1fr; }
}

/* Mobile (≤ 768px) */
@media (max-width: 768px) {
  .section { padding-block: var(--space-16); }

  /* Nav mobile */
  .nav-toggle {
    display: flex;
    z-index: 110;
    position: relative;
  }
  .nav-links {
    position: fixed;
    top: 0; right: 0;
    height: 100dvh;
    width: min(320px, 100vw);
    flex-direction: column;
    align-items: flex-start;
    padding: calc(var(--nav-h) + var(--space-8)) var(--space-8) var(--space-8);
    background: rgba(6, 11, 24, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid var(--clr-border);
    transform: translateX(100%);
    transition: transform 0.35s var(--ease-out);
    z-index: 105;
    gap: var(--space-2);
  }
  .nav-links.is-open { transform: translateX(0); }
  .nav-link { font-size: var(--text-base); width: 100%; }
  .nav-cta { margin-left: 0; margin-top: var(--space-4); }

  /* Nav toggle animation */
  .nav-toggle[aria-expanded="true"] .bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .nav-toggle[aria-expanded="true"] .bar:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle[aria-expanded="true"] .bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero .container { padding-block: var(--space-16); }
  .hero-title { font-size: clamp(var(--text-3xl), 8vw, var(--text-5xl)); }

  .hero-actions { justify-content: center; }
  .floating-badge { display: none; }

  .learn-grid { grid-template-columns: 1fr; }

  .why-stats { grid-template-columns: 1fr 1fr; }

  .roadmap-step { grid-template-columns: 48px 1fr; gap: var(--space-4); }
  .roadmap-num { width: 48px; height: 48px; }
  .roadmap-track { left: 24px; }

  .form-row { flex-direction: column; }
  .form-submit { width: 100%; justify-content: center; }

  .testimonials-grid { grid-template-columns: 1fr; }

  .footer-nav { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .back-to-top { bottom: var(--space-6); right: var(--space-6); }

  .community-grid { grid-template-columns: 1fr; }
  .community-cta-card { padding: var(--space-8); }
  .consult-cta-actions { min-width: unset; width: 100%; }
}

/* Small mobile (≤ 480px) */
@media (max-width: 480px) {
  .hero-topics { justify-content: center; }
  .hero-actions { flex-direction: column; align-items: center; width: 100%; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  .section-title { font-size: var(--text-3xl); }
  .cta-card-title { font-size: var(--text-2xl); }

  .why-stats { grid-template-columns: 1fr 1fr; }
  .footer-nav { grid-template-columns: 1fr; }

  .final-cta-inner { padding: var(--space-10) var(--space-6); }
  .final-cta-actions { flex-direction: column; align-items: center; width: 100%; }
  .final-cta-actions .btn { width: 100%; justify-content: center; }
}

/* ----------------------------------------------------------------
   19. FOCUS / ACCESSIBILITY
   ---------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--clr-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
a:focus-visible { border-radius: 3px; }

/* Skip to main content */
.skip-link {
  position: fixed;
  top: -100%;
  left: var(--space-4);
  z-index: 9999;
  background: var(--clr-primary);
  color: #fff;
  padding: var(--space-3) var(--space-6);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-weight: 700;
  transition: top 0.2s;
}
.skip-link:focus { top: 0; }

/* Print styles */
@media print {
  .nav-header, .hero-bg, .back-to-top, .logos-section { display: none; }
  body { background: #fff; color: #000; }
}