/* ============================================================
   MAIN.CSS — Global design system for reubenc.com
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600&display=swap');

/* ── CSS Variables ─────────────────────────────────────────── */
:root {
  --accent:        #00AAFF;
  --accent-dim:    #0077CC;
  --accent-glow:   rgba(0, 170, 255, 0.25);
  --accent-glow-strong: rgba(0, 170, 255, 0.5);

  --bg-glass:      rgba(255, 255, 255, 0.035);
  --bg-glass-hover:rgba(255, 255, 255, 0.07);
  --bg-card:       rgba(10, 14, 20, 0.6);
  --border:        rgba(255, 255, 255, 0.08);
  --border-accent: rgba(0, 170, 255, 0.3);

  --text-primary:  #FFFFFF;
  --text-secondary:#A8B4C0;
  --text-muted:    #606878;

  --font-head:     'Space Grotesk', sans-serif;
  --font-body:     'Inter', sans-serif;

  --radius-sm:     6px;
  --radius-md:     12px;
  --radius-lg:     20px;
  --radius-pill:   999px;

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

  --nav-height:    72px;
  --max-width:     1100px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: #0c0e10;
  background-image: url('../img/Background.jpg');
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
  background-repeat: no-repeat;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Subtle dark overlay to deepen contrast */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: rgba(8, 10, 14, 0.55);
  pointer-events: none;
  z-index: 0;
}

/* ── Page wrapper ───────────────────────────────────────────── */
.page-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

/* ── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.8rem, 7vw, 5.5rem); font-weight: 700; }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }

p {
  font-family: var(--font-body);
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
  line-height: 1.75;
  color: var(--text-secondary);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover { color: #fff; }

/* ── Layout helpers ─────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 2.5rem);
}

.section {
  padding: clamp(5rem, 10vw, 8rem) 0;
}

/* ── Navigation ─────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: background var(--transition), backdrop-filter var(--transition);
}

.nav.scrolled {
  background: rgba(8, 10, 14, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 2.5rem);
}

.nav-logo {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  transition: color var(--transition);
}

.nav-logo span {
  color: var(--accent);
}

.nav-logo:hover { color: var(--accent); }

/* Pill nav */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  padding: 0.35rem;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.nav-links a {
  display: block;
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(0, 170, 255, 0.15);
}

.nav-links a.active {
  color: var(--accent);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  transition: all var(--transition);
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all var(--transition);
}

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

/* Mobile menu overlay */
.nav-mobile {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(8, 10, 14, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.nav-mobile.open {
  display: flex;
  opacity: 1;
  pointer-events: all;
}

.nav-mobile a {
  font-family: var(--font-head);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  transition: color var(--transition);
  position: relative;
}

.nav-mobile a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

.nav-mobile a:hover { color: var(--accent); }
.nav-mobile a:hover::after { width: 100%; }

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  outline: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #000;
  font-weight: 600;
  box-shadow: 0 0 20px var(--accent-glow);
}

.btn-primary:hover {
  background: #fff;
  color: #000;
  box-shadow: 0 0 32px var(--accent-glow-strong);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
  transform: translateY(-2px);
}

/* ── Glass cards ─────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--transition);
}

.card:hover {
  border-color: var(--border-accent);
  background: rgba(10, 14, 20, 0.7);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), 0 0 30px var(--accent-glow);
}

/* ── Section labels ──────────────────────────────────────────── */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.section-label::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}

/* ── Divider line ────────────────────────────────────────────── */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 4rem 0;
}

/* ── Accent dot ──────────────────────────────────────────────── */
.accent-dot {
  color: var(--accent);
}

/* ── Page transition overlay ─────────────────────────────────── */
#page-transition {
  position: fixed;
  inset: 0;
  background: #080a0e;
  z-index: 9999;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.35s ease;
}

#page-transition.entering {
  opacity: 1;
  pointer-events: all;
}

/* ── Scroll reveal base ──────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ── Footer ──────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  text-align: center;
}

footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

footer a {
  color: var(--accent);
}

/* ── Scrollbar ───────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent-dim); }

/* ── Selection ───────────────────────────────────────────────── */
::selection {
  background: var(--accent-glow-strong);
  color: #fff;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  body {
    background-attachment: scroll;
  }
}