/* ============================================================
   iGlutek — main.css
   Core styles: variables, reset, typography, layout, nav, footer
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@200;300;400;500;600;700;800&family=Manrope:wght@300;400;500;600;700&display=swap');

/* ─── CSS VARIABLES ─────────────────────────────────────── */
:root {
  /* Core Palette — Modern Dark Precision */
  --bg-deep:       #02040E;
  --bg-primary:    #04071A;
  --bg-secondary:  #070D24;
  --bg-tertiary:   #0C1530;
  --bg-card:       rgba(255,255,255,0.032);
  --bg-card-hover: rgba(255,255,255,0.058);

  /* Accent — Electric Blue · Vivid Cyan · Violet */
  --blue:          #4C7EFF;
  --blue-bright:   #7CA8FF;
  --blue-dim:      #2D5EDA;
  --teal:          #00D9C4;
  --teal-light:    #3EEEDD;
  --violet:        #8B72FF;
  --violet-dim:    rgba(139,114,255,0.18);
  --silver:        #8899C4;
  --silver-light:  #B8C8E8;

  /* Text */
  --text-primary:  rgba(255,255,255,0.95);
  --text-secondary:rgba(200,215,255,0.60);
  --text-muted:    rgba(160,185,255,0.30);
  --text-accent:   #7CA8FF;

  /* Borders */
  --border:        rgba(100,140,255,0.07);
  --border-blue:   rgba(76,126,255,0.22);
  --border-glow:   rgba(76,126,255,0.52);

  /* Gradients */
  --grad-blue:       linear-gradient(135deg,#4C7EFF 0%,#00D9C4 100%);
  --grad-blue-r:     linear-gradient(135deg,#00D9C4 0%,#4C7EFF 100%);
  --grad-violet:     linear-gradient(135deg,#4C7EFF 0%,#8B72FF 100%);
  --grad-hero:       radial-gradient(ellipse 80% 80% at 18% 40%,rgba(76,126,255,0.16) 0%,transparent 58%),
                     radial-gradient(ellipse 55% 55% at 82% 18%,rgba(0,217,196,0.10) 0%,transparent 52%),
                     radial-gradient(ellipse 45% 45% at 58% 82%,rgba(139,114,255,0.08) 0%,transparent 48%);
  --grad-card:       linear-gradient(135deg,rgba(76,126,255,0.07) 0%,rgba(0,217,196,0.03) 100%);
  --grad-text:       linear-gradient(135deg,#fff 0%,#A8C8FF 100%);
  --grad-text-blue:  linear-gradient(135deg,#4C7EFF 0%,#00D9C4 100%);
  --grad-surface:    linear-gradient(135deg,rgba(255,255,255,0.055) 0%,rgba(255,255,255,0.018) 100%);

  /* Glass */
  --glass-bg:      rgba(76,126,255,0.035);
  --glass-bg-mid:  rgba(76,126,255,0.065);
  --glass-border:  rgba(76,126,255,0.10);
  --glass-blur:    blur(28px) saturate(200%);

  /* Shadows */
  --shadow-sm:     0 2px 14px rgba(0,0,0,0.35);
  --shadow-md:     0 8px 32px rgba(0,0,0,0.50);
  --shadow-lg:     0 24px 72px rgba(0,0,0,0.65);
  --shadow-blue:   0 8px 32px rgba(76,126,255,0.28);
  --shadow-blue-lg:0 28px 80px rgba(76,126,255,0.32);

  /* Typography */
  --font-display:  'Sora', sans-serif;
  --font-body:     'Manrope', sans-serif;

  /* Spacing */
  --sp-xs:  0.5rem;
  --sp-sm:  1rem;
  --sp-md:  1.5rem;
  --sp-lg:  2.5rem;
  --sp-xl:  4rem;
  --sp-2xl: 6rem;
  --sp-3xl: 9rem;

  /* Border Radius */
  --r-sm:   8px;
  --r-md:   16px;
  --r-lg:   24px;
  --r-xl:   36px;
  --r-full: 9999px;

  /* Transitions */
  --t-fast:  0.18s cubic-bezier(0.4,0,0.2,1);
  --t-base:  0.32s cubic-bezier(0.4,0,0.2,1);
  --t-slow:  0.6s  cubic-bezier(0.4,0,0.2,1);
  --t-ease:  0.45s cubic-bezier(0.16,1,0.3,1);

  /* Layout */
  --max-w:    1280px;
  --nav-h:    78px;

  /* Z-index */
  --z-nav:    1000;
  --z-modal:  2000;
}

/* Light section overrides */
.section-light {
  --bg-primary:    #EDF2FF;
  --bg-secondary:  #E2EAFF;
  --bg-card:       rgba(255,255,255,0.90);
  --bg-card-hover: #FFFFFF;
  --text-primary:  #04071A;
  --text-secondary:#2D3F6C;
  --text-muted:    #6678A0;
  --border:        rgba(0,30,100,0.07);
  --border-blue:   rgba(76,126,255,0.18);
  --glass-bg:      rgba(255,255,255,0.70);
  --glass-bg-mid:  rgba(255,255,255,0.90);
  --glass-border:  rgba(255,255,255,0.95);
  background-color: var(--bg-primary);
  color: var(--text-primary);
}
.section-light .section-label { color: var(--blue); }
.section-light h2,
.section-light h3 { color: var(--text-primary); }

/* ─── 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);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

h1 { font-size: clamp(2.8rem, 6vw, 5.5rem); font-weight: 700; letter-spacing: -0.03em; }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); font-weight: 600; }
h3 { font-size: clamp(1.4rem, 2.5vw, 2rem); font-weight: 600; }
h4 { font-size: clamp(1.1rem, 1.8vw, 1.4rem); font-weight: 500; }
h5 { font-size: 1rem; font-weight: 500; letter-spacing: 0.02em; }

p { font-size: 1.0625rem; color: var(--text-secondary); max-width: 68ch; }

.text-gradient {
  background: var(--grad-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-gradient-blue {
  background: var(--grad-text-blue);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue-bright);
  margin-bottom: var(--sp-sm);
}
.section-label::before {
  content: '';
  width: 20px;
  height: 1.5px;
  background: var(--grad-blue);
  border-radius: 2px;
}

/* ─── LAYOUT UTILITIES ───────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.section {
  padding: var(--sp-3xl) 0;
  background-color: var(--bg-primary);
  position: relative;
}
.section-sm { padding: var(--sp-2xl) 0; }

.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: var(--sp-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--sp-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4,1fr); gap: var(--sp-md); }

.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col { display: flex; flex-direction: column; }

.text-center { text-align: center; }
.text-center p { margin: 0 auto; }

/* ─── NAVIGATION ─────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: var(--z-nav);
  transition: background var(--t-base), box-shadow var(--t-base), backdrop-filter var(--t-base);
}
.nav.scrolled {
  background: rgba(5,12,26,0.88);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: 0 1px 0 var(--border), 0 8px 32px rgba(0,0,0,0.35);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.nav-logo-mark {
  width: 36px; height: 36px;
  background: var(--grad-blue);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.02em;
  box-shadow: var(--shadow-blue);
}
.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}
.nav-logo-text span { color: var(--blue-bright); }

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 2vw, 1.8rem);
}
.nav-link {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--t-fast);
  position: relative;
  padding: 4px 0;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1.5px;
  background: var(--grad-blue);
  transition: width var(--t-base);
  border-radius: 2px;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link.active { color: var(--text-primary); }

.nav-cta {
  font-family: var(--font-display);
  font-size: 0.83rem;
  font-weight: 600;
  color: #fff;
  background: var(--grad-blue);
  padding: 9px 20px;
  border-radius: var(--r-full);
  transition: opacity var(--t-fast), box-shadow var(--t-fast), transform var(--t-fast);
  box-shadow: var(--shadow-blue);
  white-space: nowrap;
}
.nav-cta:hover { opacity: 0.9; box-shadow: var(--shadow-blue-lg); transform: translateY(-1px); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.nav-hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--t-base);
}

/* ─── MOBILE NAV ─────────────────────────────────────────── */
.nav-mobile {
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: rgba(5,12,26,0.96);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border);
  padding: var(--sp-md);
  display: flex;
  flex-direction: column;
  gap: 4px;
  transform: translateY(-20px);
  opacity: 0;
  pointer-events: none;
  transition: var(--t-base);
  z-index: calc(var(--z-nav) - 1);
}
.nav-mobile.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}
.nav-mobile .nav-link {
  padding: 12px 16px;
  border-radius: var(--r-sm);
  transition: background var(--t-fast), color var(--t-fast);
}
.nav-mobile .nav-link:hover { background: var(--glass-bg); color: var(--text-primary); }
.nav-mobile .nav-cta { align-self: flex-start; margin-top: 8px; }

/* ─── FOOTER ─────────────────────────────────────────────── */
.footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: var(--sp-3xl) 0 var(--sp-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: var(--sp-lg);
  padding-bottom: var(--sp-2xl);
  border-bottom: 1px solid var(--border);
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 28ch;
  margin-top: var(--sp-sm);
  line-height: 1.6;
}
.footer-brand .nav-logo { margin-bottom: var(--sp-sm); }
.footer-socials {
  display: flex;
  gap: 10px;
  margin-top: var(--sp-md);
}
.footer-social-link {
  width: 36px; height: 36px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  font-size: 0.75rem;
  transition: var(--t-fast);
}
.footer-social-link:hover {
  border-color: var(--border-blue);
  color: var(--blue-bright);
  background: var(--glass-bg);
}

.footer-col h5 {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--sp-md);
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: color var(--t-fast);
}
.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--sp-lg);
  flex-wrap: wrap;
  gap: var(--sp-sm);
}
.footer-bottom p {
  font-size: 0.83rem;
  color: var(--text-muted);
  max-width: none;
}
.footer-bottom-links {
  display: flex;
  gap: var(--sp-md);
}
.footer-bottom-links a {
  font-size: 0.83rem;
  color: var(--text-muted);
  transition: color var(--t-fast);
}
.footer-bottom-links a:hover { color: var(--text-secondary); }

/* Badge */
.footer-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: var(--r-full);
  margin-top: var(--sp-sm);
}
.footer-badge-dot {
  width: 6px; height: 6px;
  background: var(--teal);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

/* ─── PAGE HERO (Inner Pages) ───────────────────────────── */
.page-hero {
  min-height: 52vh;
  display: flex;
  align-items: flex-end;
  padding-top: var(--nav-h);
  padding-bottom: var(--sp-2xl);
  background: var(--bg-primary);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grad-hero);
  pointer-events: none;
}
.page-hero-content { position: relative; z-index: 1; }
.page-hero .section-label { margin-bottom: var(--sp-sm); }
.page-hero h1 { font-size: clamp(2.2rem, 5vw, 4rem); margin-bottom: var(--sp-sm); }
.page-hero p { font-size: 1.125rem; max-width: 60ch; }
.page-hero-bar {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--border-blue), transparent);
  margin-top: var(--sp-lg);
}

/* ─── SECTION SEPARATOR ──────────────────────────────────── */
.sep {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-blue), transparent);
}

/* ─── SCROLL BAR ─────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: rgba(76,126,255,0.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(76,126,255,0.5); }

/* ─── SELECTION ──────────────────────────────────────────── */
::selection { background: rgba(76,126,255,0.22); color: var(--text-primary); }

/* ─── RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2,1fr); }
  .footer-grid { grid-template-columns: repeat(2,1fr); }
  .nav-links { gap: 1rem; }
}

@media (max-width: 768px) {
  :root { --nav-h: 68px; }
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .section { padding: calc(var(--sp-3xl) * 0.65) 0; }
  .section-sm { padding: var(--sp-xl) 0; }
  .page-hero { min-height: 45vh; }
}

@media (max-width: 480px) {
  h1 { letter-spacing: -0.025em; }
  .nav-logo-text { display: none; }
}