/* ==========================================================================
   Mogulsoft.mn - Modern, High-End Tech Landing Page Styles
   Palette: Slate 900 (#0F172A), Indigo (#4F46E5), Blue (#2563EB), Cyan (#06B6D4)
   ========================================================================== */

/* --- CSS Variables & Design Tokens --- */
:root {
  --bg-dark: #070a12;
  --bg-primary: #0b0f19;
  --bg-surface: #0f172a;
  --bg-surface-elevated: rgba(30, 41, 59, 0.65);
  --bg-glass: rgba(15, 23, 42, 0.75);
  --bg-glass-card: rgba(26, 35, 53, 0.65);
  
  --primary: #2563eb;
  --primary-light: #3b82f6;
  --primary-dark: #1d4ed8;
  --indigo: #4f46e5;
  --indigo-light: #818cf8;
  --cyan: #06b6d4;
  --cyan-light: #38bdf8;
  --emerald: #10b981;

  --gradient-primary: linear-gradient(135deg, #2563eb 0%, #4f46e5 50%, #06b6d4 100%);
  --gradient-text: linear-gradient(135deg, #ffffff 30%, #93c5fd 70%, #38bdf8 100%);
  --gradient-accent: linear-gradient(135deg, #38bdf8, #818cf8);
  --gradient-card-border: linear-gradient(135deg, rgba(255, 255, 255, 0.15), rgba(59, 130, 246, 0.3), rgba(255, 255, 255, 0.03));
  
  --text-main: #ffffff;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(99, 102, 241, 0.45);
  --border-focus: rgba(56, 189, 248, 0.6);
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(37, 99, 235, 0.25);
  --shadow-glow-cyan: 0 0 35px rgba(6, 182, 212, 0.2);

  --font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);

  --header-height: 80px;
  --container-max: 1200px;
}

/* --- Global Reset & Box Sizing --- */
*, *::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-family);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.65;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Background Ambient Lights */
.ambient-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.22;
  will-change: transform;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, #2563eb, #1e40af);
  top: -150px;
  left: 20%;
  animation: floatOrb 22s infinite alternate ease-in-out;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #4f46e5, #7c3aed);
  top: 45%;
  right: -100px;
  animation: floatOrb 26s infinite alternate-reverse ease-in-out;
}

.orb-3 {
  width: 550px;
  height: 550px;
  background: radial-gradient(circle, #06b6d4, #0284c7);
  bottom: 5%;
  left: -150px;
  animation: floatOrb 30s infinite alternate ease-in-out;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, -50px) scale(1.08); }
  100% { transform: translate(-30px, 40px) scale(0.95); }
}

/* Background grid pattern */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* Background Heritage Petroglyph Watermarks (Эртний нүүдэлчдийн хадны дурсгалын бүдэг дүрс) */
.bg-petroglyph-wrap {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.petroglyph-watermark {
  position: absolute;
  background-image: url('assets/petroglyph_watermark.png');
  background-size: contain;
  background-repeat: no-repeat;
  mix-blend-mode: screen;
  pointer-events: none;
  transition: opacity 0.5s ease;
}

/* Дээд хэсгийн бүдэг дүрс (Hero / About хэсэг) */
.petroglyph-top {
  top: 10%;
  right: -50px;
  width: 650px;
  height: 480px;
  opacity: 0.045;
  filter: drop-shadow(0 0 25px rgba(56, 189, 248, 0.25));
  transform: rotate(-3deg);
}

/* Доод хэсгийн бүдэг дүрс (Projects / Contact хэсэг) */
.petroglyph-bottom {
  bottom: 8%;
  left: -70px;
  width: 720px;
  height: 520px;
  opacity: 0.038;
  filter: drop-shadow(0 0 30px rgba(37, 99, 235, 0.2));
  transform: scaleX(-1) rotate(2deg);
}

@media (max-width: 768px) {
  .petroglyph-top {
    width: 360px;
    height: 270px;
    right: -30px;
    opacity: 0.035;
  }
  .petroglyph-bottom {
    width: 390px;
    height: 290px;
    left: -40px;
    opacity: 0.03;
  }
}

/* Content Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-secondary);
}

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

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.section {
  padding: 100px 0;
  position: relative;
  z-index: 1;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 60px auto;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.28);
  color: var(--cyan-light);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  backdrop-filter: blur(8px);
}

.section-badge i {
  font-size: 0.8rem;
}

.section-title {
  font-size: 2.35rem;
  margin-bottom: 18px;
}

.section-subtitle {
  font-size: 1.08rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition-normal);
  text-decoration: none;
  line-height: 1;
  position: relative;
  overflow: hidden;
}

.btn i {
  font-size: 0.95rem;
  transition: transform 0.2s ease;
}

.btn:hover i {
  transform: translateX(4px);
}

.btn-primary {
  background: var(--gradient-primary);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.55);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  color: #ffffff;
}

.btn-sm {
  padding: 10px 18px;
  font-size: 0.88rem;
}

.btn-block {
  width: 100%;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 100;
  display: flex;
  align-items: center;
  transition: var(--transition-normal);
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  height: 70px;
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* Brand Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.45rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.03em;
}

.logo-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--gradient-primary);
  border: 1px solid rgba(255, 255, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.45), 0 0 15px rgba(6, 182, 212, 0.25);
  position: relative;
  overflow: hidden;
  padding: 6px;
  transition: var(--transition-normal);
  flex-shrink: 0;
}

.brand-logo:hover .logo-icon-wrap {
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 6px 24px rgba(37, 99, 235, 0.6), 0 0 20px rgba(6, 182, 212, 0.4);
  border-color: rgba(255, 255, 255, 0.45);
}

.brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.35));
  transition: transform 0.3s ease;
}

.brand-logo:hover .brand-logo-img {
  transform: scale(1.06);
}

.brand-text {
  font-weight: 800;
  letter-spacing: -0.5px;
}

.brand-text span {
  color: var(--cyan-light);
  font-weight: 500;
}

/* Nav Links */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
  transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: #ffffff;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Hamburger menu button */
.mobile-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 1.35rem;
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.mobile-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: calc(var(--header-height) + 40px);
  padding-bottom: 60px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 50px;
}

.hero-content {
  max-width: 650px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--emerald);
  box-shadow: 0 0 10px var(--emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1.1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 3.25rem;
  line-height: 1.18;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-description {
  font-size: 1.12rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

/* Stats Counter Row */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 2.1rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.03em;
  display: flex;
  align-items: baseline;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 4px;
}

/* Hero Tech Mockup Card (Glassmorphism Dashboard) */
.hero-visual {
  position: relative;
}

.tech-window-card {
  background: var(--bg-glass-card);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: relative;
  transition: transform 0.4s ease, border-color 0.4s ease;
}

.tech-window-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.4);
}

.window-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  margin-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.window-dots {
  display: flex;
  gap: 8px;
}

.window-dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.dot-red { background-color: #ef4444; }
.dot-yellow { background-color: #f59e0b; }
.dot-green { background-color: #10b981; }

.window-tag {
  font-size: 0.75rem;
  color: var(--cyan-light);
  font-family: monospace;
  background: rgba(6, 182, 212, 0.1);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(6, 182, 212, 0.2);
}

.code-snippet {
  font-family: 'Fira Code', Consolas, Monaco, monospace;
  font-size: 0.85rem;
  line-height: 1.7;
  color: #e2e8f0;
  background: rgba(11, 15, 25, 0.8);
  padding: 16px;
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.code-comment { color: #64748b; }
.code-keyword { color: #f43f5e; font-weight: 600; }
.code-func { color: #38bdf8; }
.code-string { color: #a7f3d0; }
.code-prop { color: #fbbf24; }

/* Floating Cards within Hero Visual */
.floating-status-card {
  position: absolute;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(59, 130, 246, 0.35);
  backdrop-filter: blur(16px);
  padding: 14px 18px;
  border-radius: var(--radius-md);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  gap: 14px;
  z-index: 2;
  animation: floatCard 6s ease-in-out infinite alternate;
}

.card-top-right {
  top: -20px;
  right: -20px;
}

.card-bottom-left {
  bottom: -24px;
  left: -20px;
  animation-delay: 2s;
}

@keyframes floatCard {
  0% { transform: translateY(0); }
  100% { transform: translateY(-12px); }
}

.status-icon-wrap {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.status-icon-wrap.ai {
  background: rgba(99, 102, 241, 0.2);
  color: #818cf8;
}

.status-icon-wrap.cloud {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
}

.status-info h5 {
  font-size: 0.88rem;
  font-weight: 600;
  color: #ffffff;
}

.status-info p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.active-metric-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
}

.metric-badge {
  color: var(--emerald);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   Services Section
   ========================================================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: var(--shadow-md), 0 0 30px rgba(37, 99, 235, 0.15);
}

.service-card:hover::before {
  opacity: 1;
}

.service-icon-box {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: rgba(37, 99, 235, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--cyan-light);
  margin-bottom: 24px;
  transition: var(--transition-normal);
}

.service-card:hover .service-icon-box {
  background: var(--gradient-primary);
  color: #ffffff;
  border-color: transparent;
  transform: scale(1.08);
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.4);
}

.service-card h3 {
  font-size: 1.28rem;
  margin-bottom: 12px;
  line-height: 1.35;
}

.service-card p {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 22px;
  flex-grow: 1;
}

.service-features {
  margin-bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-features li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-features li i {
  color: var(--cyan-light);
  font-size: 0.75rem;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--cyan-light);
  transition: gap 0.2s ease;
  margin-top: auto;
}

.service-card:hover .service-link {
  gap: 10px;
  color: #ffffff;
}

/* ==========================================================================
   Why Us & Tech Stack Section
   ========================================================================== */
.why-us-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 80px;
}

.why-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  backdrop-filter: blur(14px);
  transition: var(--transition-normal);
}

.why-card:hover {
  transform: translateY(-5px);
  border-color: rgba(56, 189, 248, 0.35);
  box-shadow: var(--shadow-md);
}

.why-icon {
  font-size: 2rem;
  margin-bottom: 18px;
  display: inline-block;
}

.why-card h4 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.why-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Tech Stack Showcase */
.tech-stack-wrap {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  text-align: center;
  backdrop-filter: blur(16px);
}

.tech-stack-header {
  margin-bottom: 32px;
}

.tech-stack-header h4 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.tech-stack-header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.tech-pills-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.tech-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px;
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition-normal);
  cursor: default;
}

.tech-pill i {
  font-size: 1.15rem;
  color: var(--cyan-light);
  transition: transform 0.2s ease;
}

.tech-pill:hover {
  background: rgba(37, 99, 235, 0.15);
  border-color: rgba(59, 130, 246, 0.4);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.2);
}

.tech-pill:hover i {
  transform: scale(1.15);
}

/* ==========================================================================
   Portfolio / Projects Section
   ========================================================================== */
.portfolio-filters {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 9px 20px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-normal);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.project-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  transform: translateY(-6px);
  border-color: rgba(99, 102, 241, 0.45);
  box-shadow: var(--shadow-lg), 0 0 35px rgba(37, 99, 235, 0.2);
}

.project-preview {
  height: 230px;
  position: relative;
  background: #111827;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-illustration {
  width: 100%;
  height: 100%;
  transition: transform 0.5s ease;
  position: relative;
}

.project-card:hover .project-illustration {
  transform: scale(1.05);
}

.project-badge-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--cyan-light);
  backdrop-filter: blur(8px);
  z-index: 2;
}

.project-details {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.project-details h3 {
  font-size: 1.35rem;
  margin-bottom: 10px;
}

.project-details p {
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 20px;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.project-tags span {
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.project-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.project-metric {
  font-size: 0.85rem;
  color: var(--emerald);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

.project-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--cyan-light);
  display: flex;
  align-items: center;
  gap: 6px;
}

.project-link:hover {
  color: #ffffff;
}

/* ==========================================================================
   Contact Us Section
   ========================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 50px;
  align-items: start;
}

.contact-info-panel {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(16px);
}

.contact-info-panel h3 {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.contact-info-panel > p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 36px;
}

.contact-details-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-bottom: 36px;
}

.contact-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.contact-icon-box {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-md);
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan-light);
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-text h5 {
  font-size: 0.95rem;
  color: #ffffff;
  margin-bottom: 4px;
}

.contact-text p, .contact-text a {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.contact-text a:hover {
  color: var(--cyan-light);
}

.office-hours-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: var(--radius-md);
  font-size: 0.86rem;
  color: #a7f3d0;
}

.office-hours-badge i {
  color: var(--emerald);
  font-size: 1.1rem;
}

/* Contact Form Card */
.contact-form-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md);
}

.contact-form-card h4 {
  font-size: 1.4rem;
  margin-bottom: 8px;
}

.contact-form-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  margin-bottom: 28px;
}

.form-group-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 13px 16px;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  color: #ffffff;
  font-family: inherit;
  font-size: 0.92rem;
  transition: var(--transition-normal);
  outline: none;
}

.form-control:focus {
  border-color: var(--primary-light);
  background: rgba(15, 23, 42, 0.95);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
}

.form-control::placeholder {
  color: var(--text-dim);
}

textarea.form-control {
  resize: vertical;
  min-height: 110px;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
}

.form-select option {
  background-color: var(--bg-surface);
  color: #ffffff;
}

/* Form Toast Notification */
.toast-notice {
  position: fixed;
  bottom: 30px;
  right: 30px;
  padding: 16px 24px;
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid var(--emerald);
  border-radius: var(--radius-md);
  color: #ffffff;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition-normal);
  backdrop-filter: blur(12px);
}

.toast-notice.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.toast-notice i {
  color: var(--emerald);
  font-size: 1.3rem;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: #070a12;
  border-top: 1px solid var(--border-subtle);
  padding: 70px 0 30px 0;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-top: 18px;
  margin-bottom: 24px;
  max-width: 320px;
}

.footer-socials {
  display: flex;
  gap: 12px;
}

.social-link {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: var(--transition-normal);
}

.social-link:hover {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #ffffff;
  transform: translateY(-3px);
  box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
}

.footer-col h5 {
  font-size: 1.05rem;
  color: #ffffff;
  margin-bottom: 20px;
  position: relative;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-block;
}

.footer-links a:hover {
  color: var(--cyan-light);
  transform: translateX(4px);
}

.footer-newsletter p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.newsletter-box {
  display: flex;
  gap: 8px;
}

.newsletter-box input {
  flex: 1;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: #ffffff;
  font-size: 0.88rem;
  outline: none;
}

.newsletter-box input:focus {
  border-color: var(--primary-light);
}

.newsletter-box button {
  padding: 10px 16px;
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-sm);
  color: #ffffff;
  cursor: pointer;
  font-weight: 600;
  transition: opacity 0.2s;
}

.newsletter-box button:hover {
  opacity: 0.9;
}

.footer-bottom {
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  color: var(--text-dim);
  font-size: 0.85rem;
}

.footer-bottom-links a:hover {
  color: var(--text-muted);
}

/* Scroll To Top Button */
.scroll-top-btn {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(30, 41, 59, 0.85);
  border: 1px solid var(--border-subtle);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: var(--transition-normal);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
}

.scroll-top-btn.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top-btn:hover {
  background: var(--gradient-primary);
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(37, 99, 235, 0.4);
  transform: translateY(-3px);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.7rem;
  }
  
  .services-grid,
  .why-us-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 868px) {
  .header {
    height: 70px;
  }
  
  .mobile-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: rgba(11, 15, 25, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    align-items: flex-start;
    padding: 24px 30px;
    gap: 18px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.5);
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    font-size: 1.1rem;
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-cta {
    display: none;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    max-width: 500px;
    margin: 0 auto;
  }

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

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

@media (max-width: 640px) {
  .section {
    padding: 70px 0;
  }

  .section-title {
    font-size: 1.95rem;
  }

  .hero-title {
    font-size: 2.15rem;
  }

  .services-grid,
  .why-us-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    grid-template-columns: 1fr;
    gap: 16px;
    text-align: center;
  }

  .stat-number {
    justify-content: center;
  }

  .form-group-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .contact-info-panel,
  .contact-form-card {
    padding: 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .floating-status-card {
    display: none;
  }
}