/* ==========================================================================
   BrainSoftware 2026 - Master Stylesheet
   Design System: Corporate Dark Tech / Modern Glassmorphism
   ========================================================================== */

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

:root {
  /* Color Palette */
  --bg-dark: #07090e;
  --bg-surface: #0f1420;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-card-hover: rgba(26, 36, 56, 0.85);
  --bg-glass: rgba(15, 20, 32, 0.65);
  
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-light: #60a5fa;
  --primary-glow: rgba(59, 130, 246, 0.25);
  
  --accent: #818cf8;
  --accent-teal: #14b8a6;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-sub: #64748b;
  
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-glow: rgba(59, 130, 246, 0.35);
  
  /* Layout */
  --max-width: 1240px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  /* Transitions & Shadows */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.18);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: dark;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Grid & Mesh Background */
.bg-mesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  background: 
    radial-gradient(circle at 15% 20%, rgba(59, 130, 246, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 85% 60%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 90%, rgba(20, 184, 166, 0.08) 0%, transparent 50%);
}

.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
  background-size: 40px 40px;
  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);
  mask-image: radial-gradient(circle at 50% 40%, black 30%, transparent 80%);
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  color: var(--text-main);
  line-height: 1.25;
  font-weight: 700;
}

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

a:hover {
  color: var(--primary);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Section Common */
section {
  padding: 100px 0;
  position: relative;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.25);
  color: var(--primary-light);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
}

.section-title {
  font-size: 2.5rem;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1.1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  outline: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-hover) 100%);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.5);
  color: #ffffff;
}

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

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  color: var(--text-main);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

/* Header & Navigation */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  background: rgba(7, 9, 14, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

.site-header.scrolled {
  padding: 12px 0;
  background: rgba(7, 9, 14, 0.98);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  border-bottom-color: rgba(59, 130, 246, 0.25);
}

.brand-logo {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.brand-text {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.5px;
  text-decoration: none;
}

.brand-accent {
  color: var(--primary-light);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo img {
  height: 42px;
  width: auto;
  display: block;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-link {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}

.lang-switcher {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 4px;
}

.lang-btn {
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.lang-btn.active {
  background: var(--primary);
  color: #ffffff;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  padding-top: 170px;
  padding-bottom: 100px;
  text-align: center;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 700;
  letter-spacing: -1px;
  margin-bottom: 24px;
  line-height: 1.15;
}

.text-gradient {
  background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 50%, #93c5fd 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 70px;
  flex-wrap: wrap;
}

/* Stats Counter Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.stat-number {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--primary-light);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

/* About Section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-text .p-lead {
  font-size: 1.15rem;
  color: var(--text-main);
  margin-bottom: 16px;
  font-weight: 500;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 24px;
}

.tags-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.tag-badge {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: 0.875rem;
  font-weight: 500;
}

.about-visual {
  position: relative;
}

.glass-box {
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.7) 0%, rgba(15, 23, 42, 0.8) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}

.glass-box::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 60%);
  pointer-events: none;
}

.code-snippet {
  font-family: monospace;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
}

.code-keyword { color: #f472b6; }
.code-func { color: #60a5fa; }
.code-str { color: #34d399; }
.code-comment { color: #64748b; font-style: italic; }

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 28px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.service-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.service-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

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

.service-icon {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  color: var(--primary-light);
  font-size: 1.5rem;
}

.service-title {
  font-size: 1.35rem;
  margin-bottom: 14px;
}

.service-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Portfolio & Showcase Section */
.portfolio-tabs {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 40px;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 30px;
}

.portfolio-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  backdrop-filter: blur(12px);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.portfolio-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

.portfolio-media {
  width: 100%;
  height: 220px;
  background: var(--bg-surface);
  position: relative;
  overflow: hidden;
}

.portfolio-media img, .portfolio-media video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-normal);
}

.portfolio-card:hover .portfolio-media img,
.portfolio-card:hover .portfolio-media video {
  transform: scale(1.05);
}

.portfolio-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.portfolio-category {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--primary-light);
  letter-spacing: 1px;
  margin-bottom: 8px;
}

.portfolio-title {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.portfolio-desc {
  color: var(--text-muted);
  font-size: 0.925rem;
  margin-bottom: 24px;
  flex-grow: 1;
}

/* Tech Stack Showcase */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 20px;
  margin-top: 40px;
}

.tech-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  transition: all var(--transition-fast);
}

.tech-item:hover {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
}

.tech-icon {
  font-size: 2.2rem;
  margin-bottom: 12px;
  color: var(--primary-light);
}

.tech-name {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
}

/* Why Us Section */
.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.why-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px;
  display: flex;
  gap: 24px;
  align-items: flex-start;
  transition: all var(--transition-fast);
}

.why-card:hover {
  border-color: var(--border-glow);
  background: var(--bg-card-hover);
}

.why-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: rgba(59, 130, 246, 0.15);
  color: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
}

.why-content h3 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.why-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Direct Contact Section (No Form) */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 50px;
}

.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  backdrop-filter: blur(16px);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.contact-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-6px);
  box-shadow: var(--shadow-glow);
}

.contact-card-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: rgba(59, 130, 246, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  color: var(--primary-light);
  margin-bottom: 24px;
}

.contact-card-title {
  font-size: 1.3rem;
  margin-bottom: 10px;
}

.contact-card-desc {
  color: var(--text-muted);
  font-size: 0.925rem;
  margin-bottom: 24px;
  flex-grow: 1;
}

.contact-value {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 20px;
  word-break: break-all;
}

.contact-actions {
  display: flex;
  gap: 10px;
  width: 100%;
}

.contact-actions .btn {
  flex: 1;
}

.social-bar {
  text-align: center;
  padding: 30px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.social-bar h4 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  color: var(--text-muted);
}

.social-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
}

.social-btn {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  transition: all var(--transition-fast);
}

.social-btn:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  transform: translateY(-3px);
}

/* Toast Tooltip Notification */
.toast-notice {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: var(--primary);
  color: #ffffff;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(59, 130, 246, 0.4);
  z-index: 9999;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-fast);
  pointer-events: none;
}

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

/* Footer */
.site-footer {
  padding: 60px 0 30px 0;
  border-top: 1px solid var(--border-subtle);
  background: rgba(5, 7, 12, 0.9);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 10px;
  max-width: 400px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-sub);
  font-size: 0.875rem;
  flex-wrap: wrap;
  gap: 16px;
}

.back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

.back-to-top:hover {
  color: var(--primary-light);
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.75rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .hero-title { font-size: 2.2rem; }
  .section-title { font-size: 2rem; }
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    width: 100%;
    background: rgba(15, 20, 32, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 30px;
    gap: 20px;
    border-bottom: 1px solid var(--border-subtle);
    display: none;
  }
  .nav-menu.open { display: flex; }
  .mobile-toggle { display: block; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }
}