/* ============================================================
   NREVSA TECHNOLOGIES — Design System v2
   Palette: Deep Space Dark + Cyan-to-Violet Brand Gradient
   Typography: Syne (display) + Plus Jakarta Sans (body)
   Enhanced: Glassmorphism, mesh gradients, premium effects
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&display=swap');

/* ── CSS Variables ── */
:root {
  /* Brand Gradient Colors */
  --cyan:        #3ABFF8;
  --cyan-light:  #7DD8FB;
  --blue:        #2962FF;
  --violet:      #7C3AED;
  --violet-deep: #5B21B6;
  --violet-light:#A78BFA;

  /* Dark Mode (default) */
  --bg-primary:    #060912;
  --bg-secondary:  #0A0E1A;
  --bg-card:       #0F1623;
  --bg-card-hover: #141D2E;
  --bg-glass:      rgba(10, 14, 26, 0.75);
  --bg-glass-light:rgba(15, 22, 35, 0.6);

  --text-primary:   #EEF2FF;
  --text-secondary: #8B9EC7;
  --text-muted:     #3D4F6E;

  --border:        rgba(255,255,255,0.06);
  --border-bright: rgba(58,191,248,0.22);
  --border-glow:   rgba(58,191,248,0.4);

  --shadow-sm:   0 2px 8px rgba(0,0,0,0.5);
  --shadow-md:   0 8px 32px rgba(0,0,0,0.6);
  --shadow-lg:   0 24px 64px rgba(0,0,0,0.7);
  --shadow-glow: 0 0 40px rgba(58,191,248,0.12);
  --shadow-glow-strong: 0 0 60px rgba(58,191,248,0.22);
  --shadow-violet: 0 0 40px rgba(124,58,237,0.15);

  /* Typography */
  --font-display: 'Syne', sans-serif;
  --font-body:    'Plus Jakarta Sans', sans-serif;

  /* Spacing */
  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Radius */
  --radius-sm:   6px;
  --radius-md:   12px;
  --radius-lg:   20px;
  --radius-xl:   32px;
  --radius-2xl:  48px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast:   150ms cubic-bezier(0.4,0,0.2,1);
  --transition-base:   250ms cubic-bezier(0.4,0,0.2,1);
  --transition-slow:   400ms cubic-bezier(0.4,0,0.2,1);
  --transition-spring: 500ms cubic-bezier(0.34,1.56,0.64,1);
  --transition-bounce: 600ms cubic-bezier(0.68,-0.55,0.265,1.55);

  /* Nav height */
  --nav-h: 72px;
}

/* Light Mode */
[data-theme="light"] {
  --bg-primary:    #F5F7FF;
  --bg-secondary:  #EBF0FF;
  --bg-card:       #FFFFFF;
  --bg-card-hover: #F0F4FF;
  --bg-glass:      rgba(255,255,255,0.88);
  --bg-glass-light:rgba(245,247,255,0.7);

  --text-primary:   #0D1530;
  --text-secondary: #4A5980;
  --text-muted:     #9AAAC8;

  --border:        rgba(0,0,0,0.07);
  --border-bright: rgba(41,98,255,0.18);
  --border-glow:   rgba(41,98,255,0.35);

  --shadow-sm:   0 2px 8px rgba(0,0,0,0.05);
  --shadow-md:   0 8px 32px rgba(0,0,0,0.09);
  --shadow-lg:   0 24px 64px rgba(0,0,0,0.11);
  --shadow-glow: 0 0 40px rgba(41,98,255,0.08);
  --shadow-glow-strong: 0 0 60px rgba(41,98,255,0.15);
  --shadow-violet: 0 0 40px rgba(124,58,237,0.08);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--transition-slow), color var(--transition-slow);
}

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

/* ── Gradient Utilities ── */
.gradient-text {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--blue) 50%, var(--violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-text-warm {
  background: linear-gradient(135deg, #F59E0B 0%, #EF4444 50%, var(--violet) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-bg {
  background: linear-gradient(135deg, var(--cyan) 0%, var(--blue) 50%, var(--violet) 100%);
}

.gradient-border {
  position: relative;
}
.gradient-border::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

/* ── Glassmorphism ── */
.glass {
  background: var(--bg-glass);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border: 1px solid var(--border);
}

.glass-bright {
  background: var(--bg-glass-light);
  backdrop-filter: blur(32px) saturate(200%);
  -webkit-backdrop-filter: blur(32px) saturate(200%);
  border: 1px solid var(--border-bright);
}

/* ── Typography Scale ── */
.display-xl { font-family: var(--font-display); font-size: clamp(3rem, 7vw, 6rem); font-weight: 800; line-height: 1.05; letter-spacing: -0.03em; }
.display-lg { font-family: var(--font-display); font-size: clamp(2.25rem, 5vw, 4rem); font-weight: 800; line-height: 1.1; letter-spacing: -0.025em; }
.display-md { font-family: var(--font-display); font-size: clamp(1.75rem, 3.5vw, 2.75rem); font-weight: 700; line-height: 1.15; letter-spacing: -0.02em; }
.display-sm { font-family: var(--font-display); font-size: clamp(1.25rem, 2.5vw, 1.875rem); font-weight: 700; line-height: 1.2; }

.body-lg  { font-size: 1.125rem; line-height: 1.7; }
.body-md  { font-size: 1rem;     line-height: 1.65; }
.body-sm  { font-size: 0.875rem; line-height: 1.6; }
.body-xs  { font-size: 0.75rem;  line-height: 1.5; }

.label    { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
  border-radius: inherit;
}
.btn:hover::after { opacity: 1; }

.btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--blue) 50%, var(--violet));
  background-size: 200% 200%;
  color: #fff;
  box-shadow: 0 4px 20px rgba(41,98,255,0.35), 0 0 0 0 rgba(58,191,248,0);
  animation: gradient-shift 4s ease infinite;
}
.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 32px rgba(41,98,255,0.5), 0 0 20px rgba(58,191,248,0.2);
}
.btn-primary:active { transform: translateY(0) scale(1); }

@keyframes gradient-shift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.btn-outline {
  border: 1.5px solid var(--border-bright);
  color: var(--text-primary);
  background: transparent;
}
.btn-outline:hover {
  border-color: var(--cyan);
  background: rgba(58,191,248,0.07);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(58,191,248,0.1);
}

.btn-ghost {
  color: var(--text-secondary);
  padding: 0.75rem 1.25rem;
}
.btn-ghost:hover { color: var(--text-primary); background: var(--bg-card); }

.btn-lg { padding: 1rem 2.25rem; font-size: 1.0625rem; }
.btn-sm { padding: 0.5rem 1.25rem; font-size: 0.8125rem; }

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-bright), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-bright);
  transform: translateY(-5px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}
.card:hover::before { opacity: 1; }

.card-glass {
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

/* ── Section Layout ── */
.section    { padding: var(--space-5xl) 0; }
.section-sm { padding: var(--space-4xl) 0; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}
.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* ── Section Header ── */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-4xl);
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(58,191,248,0.07);
  border: 1px solid rgba(58,191,248,0.18);
  color: var(--cyan);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
  backdrop-filter: blur(8px);
}
.section-label::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  animation: pulse-dot 2s infinite;
  flex-shrink: 0;
}
@keyframes pulse-dot {
  0%,100% { opacity:1; transform:scale(1); box-shadow: 0 0 0 0 rgba(58,191,248,0.4); }
  50%      { opacity:0.7; transform:scale(1.3); box-shadow: 0 0 0 4px rgba(58,191,248,0); }
}

/* ── Noise Texture Overlay ── */
.noise-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.02;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* ── Glow Orbs ── */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: 0;
  will-change: transform;
}
.orb-cyan   { background: radial-gradient(circle, rgba(58,191,248,0.2) 0%, transparent 70%); }
.orb-violet { background: radial-gradient(circle, rgba(124,58,237,0.2) 0%, transparent 70%); }
.orb-blue   { background: radial-gradient(circle, rgba(41,98,255,0.16) 0%, transparent 70%); }

/* ── Animated Mesh Gradient ── */
.mesh-gradient {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 30%, rgba(58,191,248,0.06) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 80% 70%, rgba(124,58,237,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 50% 50%, rgba(41,98,255,0.04) 0%, transparent 70%);
}

/* ── Grid Pattern ── */
.grid-pattern {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(rgba(58,191,248,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(58,191,248,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

/* ── Grid Layouts ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-xl); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-xl); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-xl); }

/* ── Divider ── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-bright), transparent);
  margin: var(--space-2xl) 0;
}

/* ── Badge ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}
.badge-cyan   { background: rgba(58,191,248,0.1);  color: var(--cyan);   border: 1px solid rgba(58,191,248,0.2); }
.badge-violet { background: rgba(124,58,237,0.1); color: #A78BFA; border: 1px solid rgba(124,58,237,0.2); }
.badge-blue   { background: rgba(41,98,255,0.1);  color: #60A5FA; border: 1px solid rgba(41,98,255,0.2); }
.badge-green  { background: rgba(16,185,129,0.1); color: #34D399; border: 1px solid rgba(16,185,129,0.2); }

/* ── Form Elements ── */
.form-group { display: flex; flex-direction: column; gap: 0.5rem; }
.form-label { font-size: 0.875rem; font-weight: 500; color: var(--text-secondary); }
.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.875rem 1.125rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.9375rem;
  transition: all var(--transition-fast);
  outline: none;
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(58,191,248,0.1), 0 0 20px rgba(58,191,248,0.05);
  background: var(--bg-card-hover);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); }
.form-textarea { resize: vertical; min-height: 140px; }

/* ── Scroll Animations ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s cubic-bezier(0.4,0,0.2,1), transform 0.75s cubic-bezier(0.4,0,0.2,1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left  { transform: translateX(-28px); }
.reveal-right { transform: translateX(28px); }
.reveal-left.visible, .reveal-right.visible { transform: translateX(0); }
.reveal-scale { transform: scale(0.94); }
.reveal-scale.visible { transform: scale(1); }

.stagger-1 { transition-delay: 0.08s; }
.stagger-2 { transition-delay: 0.16s; }
.stagger-3 { transition-delay: 0.24s; }
.stagger-4 { transition-delay: 0.32s; }
.stagger-5 { transition-delay: 0.40s; }
.stagger-6 { transition-delay: 0.48s; }

/* ── Glow Line ── */
.glow-line {
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--cyan) 30%, var(--violet) 70%, transparent 100%);
  opacity: 0.4;
}

/* ── Shimmer Effect ── */
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}
.shimmer {
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.06) 50%, transparent 100%);
  background-size: 200% 100%;
  animation: shimmer 2.5s infinite;
}

/* ── Float Animation ── */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-12px); }
}
@keyframes float-slow {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50%       { transform: translateY(-8px) rotate(2deg); }
}
.float      { animation: float 4s ease-in-out infinite; }
.float-slow { animation: float-slow 6s ease-in-out infinite; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: rgba(58,191,248,0.2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--cyan); }

/* ── Selection ── */
::selection { background: rgba(58,191,248,0.2); color: var(--text-primary); }

/* ── Responsive ── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: var(--space-4xl) 0; }
  .container { padding: 0 var(--space-lg); }
}
@media (max-width: 480px) {
  .section { padding: var(--space-3xl) 0; }
  .container { padding: 0 var(--space-md); }
}