/* ===================================================
   SUSANTA SAPKOTA — PREMIUM DESIGN SYSTEM
   =================================================== */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,100..1000;1,9..40,100..1000&family=Outfit:wght@100..900&display=swap');

/* ── CSS Custom Properties / Tokens ── */
:root {
  /* Palette — Dark Mode (default) */
  --bg-primary:    #080810;
  --bg-secondary:  #0e0e1a;
  --bg-card:       rgba(255,255,255,0.04);
  --bg-glass:      rgba(255,255,255,0.06);
  --border:        rgba(255,255,255,0.08);
  --border-hover:  rgba(79,142,247,0.35);

  --text-primary:  #F2F2F5;
  --text-secondary:#9898B0;
  --text-muted:    #5a5a72;

  --accent-blue:   #4F8EF7;
  --accent-blue-2: #2563eb;
  --accent-glow:   rgba(79,142,247,0.25);
  --accent-gold:   #C9A84C;
  --accent-gold-2: #f0c055;

  --gradient-hero: linear-gradient(135deg, #080810 0%, #0e101f 50%, #080810 100%);
  --gradient-card: linear-gradient(135deg, rgba(79,142,247,0.08), rgba(201,168,76,0.04));
  --gradient-text: linear-gradient(135deg, #F2F2F5 0%, #9898B0 100%);
  --gradient-accent: linear-gradient(135deg, #4F8EF7, #C9A84C);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body:    'DM Sans', sans-serif;

  /* Spacing (8px grid) */
  --space-xs:  4px;
  --space-sm:  8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  40px;
  --space-2xl: 64px;
  --space-3xl: 96px;
  --space-4xl: 128px;

  /* Borders */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:   0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:   0 8px 32px rgba(0,0,0,0.4);
  --shadow-lg:   0 20px 60px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 40px rgba(79,142,247,0.2);
  --shadow-gold: 0 0 40px rgba(201,168,76,0.15);

  /* Transitions */
  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:   cubic-bezier(0.4, 0, 1, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 200ms;
  --duration-base: 350ms;
  --duration-slow: 600ms;

  /* Z-index layers */
  --z-base:    1;
  --z-card:    10;
  --z-nav:     100;
  --z-overlay: 200;
  --z-modal:   300;
  --z-cursor:  9999;
}

/* Light mode */
[data-theme="light"] {
  --bg-primary:    #FAFAFC;
  --bg-secondary:  #F2F2F5;
  --bg-card:       rgba(255, 255, 255, 0.9);
  --bg-glass:      rgba(255, 255, 255, 0.6);
  --border:        rgba(0, 0, 0, 0.05);
  --border-hover:  rgba(79, 142, 247, 0.3);
  
  --text-primary:  #0D0D15;
  --text-secondary:#4A4A60;
  --text-muted:    #82829D;
  
  --gradient-hero: linear-gradient(135deg, #FAFAFC 0%, #EEF2FF 50%, #FAFAFC 100%);
  --gradient-card: linear-gradient(135deg, rgba(79,142,247,0.04), rgba(201,168,76,0.02));
  
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.04);
  --shadow-md:     0 8px 32px rgba(8,8,16,0.06);
  --shadow-lg:     0 20px 60px rgba(8,8,16,0.08);
  --shadow-glow:   0 0 40px rgba(79,142,247,0.1);
  --shadow-gold:   0 0 40px rgba(201,168,76,0.08);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background var(--duration-base) var(--ease-out),
              color var(--duration-base) var(--ease-out);
}
body::after {
  content: ''; position: fixed; inset: 0; pointer-events: none; z-index: 300;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)' opacity='0.04'/%3E%3C/svg%3E");
  opacity: 0.6;
}
[data-theme="light"] body::after {
  opacity: 0.3;
}

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

/* ── Typography Scale ── */
.display-xl {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 7vw, 7rem);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.03em;
}
.display-lg {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.025em;
}
.display-md {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3.5vw, 2.8rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.heading-lg {
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 2.5vw, 2rem);
  font-weight: 600;
  line-height: 1.25;
}
.heading-sm {
  font-family: var(--font-heading);
  font-size: clamp(1rem, 1.8vw, 1.4rem);
  font-weight: 600;
  line-height: 1.3;
}
.body-lg  { font-size: clamp(1rem, 1.5vw, 1.2rem); line-height: 1.75; }
.body-md  { font-size: 1rem; line-height: 1.7; }
.body-sm  { font-size: 0.875rem; line-height: 1.65; }
.label    { font-size: 0.75rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; }

/* Gradient text */
.text-gradient {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-blue {
  background: linear-gradient(135deg, #4F8EF7, #7eb3ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.text-gold {
  background: linear-gradient(135deg, #C9A84C, #f0c055);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Layout ── */
.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 {
  padding: var(--space-4xl) 0;
  position: relative;
}
.section--lg {
  padding: 160px 0;
}

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-xl); align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-lg); }
.flex   { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* ── Section Labels ── */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 6px 14px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--accent-blue);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  backdrop-filter: blur(10px);
}
.section-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--accent-blue);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  transition: all var(--duration-base) var(--ease-out);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
}
.btn:hover::after { opacity: 1; }

.btn-primary {
  background: var(--accent-blue);
  color: #fff;
  box-shadow: 0 4px 24px rgba(79,142,247,0.35);
}
.btn-primary::after { background: rgba(255,255,255,0.1); }
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(79,142,247,0.5);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
}
.btn-secondary::after { background: rgba(79,142,247,0.08); }
.btn-secondary:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-gold {
  background: linear-gradient(135deg, #C9A84C, #f0c055);
  color: #0D0D15;
  box-shadow: 0 4px 24px rgba(201,168,76,0.3);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(201,168,76,0.45);
}

.btn-lg { padding: 18px 36px; font-size: 1rem; }
.btn-sm { padding: 10px 20px; font-size: 0.85rem; }

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--duration-base) var(--ease-out);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: var(--gradient-card);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-out);
}
.card:hover::before { opacity: 1; }
.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow), var(--shadow-md);
}

.glass-card {
  background: var(--bg-glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-xl);
  transition: all var(--duration-base) var(--ease-out);
}
.glass-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

/* ── Divider ── */
.divider {
  width: 48px;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: var(--radius-full);
  margin: var(--space-md) 0;
}

/* ── Scroll Animations ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal-left.visible { opacity: 1; transform: translateX(0); }
.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal-right.visible { opacity: 1; transform: translateX(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; }

/* ── Keyframes ── */
@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-18px); }
}
@keyframes float-slow {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(2deg); }
}
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
@keyframes gradient-shift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes shimmer {
  from { transform: translateX(-100%); }
  to   { transform: translateX(100%); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes counter-up {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(79,142,247,0.2); }
  50% { box-shadow: 0 0 50px rgba(79,142,247,0.5); }
}
@keyframes orb-drift {
  0%, 100% { transform: translate(0,0) scale(1); }
  33% { transform: translate(30px,-20px) scale(1.05); }
  66% { transform: translate(-20px,10px) scale(0.95); }
}
@keyframes text-reveal {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0% 0 0); }
}
@keyframes loader-progress {
  from { width: 0%; }
  to   { width: 100%; }
}
@keyframes loader-fade-out {
  from { opacity: 1; visibility: visible; }
  to   { opacity: 0; visibility: hidden; }
}
@keyframes bounce-x {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(5px); }
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent-blue); border-radius: 10px; }

/* ── Selection ── */
::selection { background: rgba(79,142,247,0.3); color: var(--text-primary); }

/* ── Responsive Breakpoints ── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .container { padding: 0 var(--space-lg); }
}
@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .section { padding: var(--space-3xl) 0; }
  .section--lg { padding: var(--space-3xl) 0; }
  .container { padding: 0 var(--space-md); }
  .hidden-mobile { display: none !important; }
}
@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
}