/* ============================================
   특이점 스튜디오 (Shingularity Studio)
   Corporate Website Stylesheet
   ============================================ */

/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;600;700;800;900&family=Outfit:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* --- CSS Variables --- */
:root {
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;
  --color-accent: #06d6a0;
  --color-accent-dark: #05b88a;
  --color-dark: #0f172a;
  --color-dark-secondary: #1e293b;
  --color-gray-900: #111827;
  --color-gray-800: #1f2937;
  --color-gray-700: #374151;
  --color-gray-600: #4b5563;
  --color-gray-500: #6b7280;
  --color-gray-400: #9ca3af;
  --color-gray-300: #d1d5db;
  --color-gray-200: #e5e7eb;
  --color-gray-100: #f3f4f6;
  --color-gray-50: #f9fafb;
  --color-white: #ffffff;
  --color-bg: #fafbfc;

  --font-heading: 'Outfit', 'Noto Sans KR', sans-serif;
  --font-body: 'Noto Sans KR', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;

  --max-width: 1200px;
  --header-height: 72px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--color-gray-800);
  background-color: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

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

/* --- Animations --- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(37,99,235,0.3); }
  50% { box-shadow: 0 0 0 12px rgba(37,99,235,0); }
}

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

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   HEADER / NAVIGATION
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: all var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

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

/* --- Logo --- */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--color-dark);
}

.logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.logo-icon::before {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  background: var(--color-white);
  border-radius: 50%;
  opacity: 0.9;
}

.logo-icon::after {
  content: '';
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.logo-text-en {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--color-gray-500);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  display: block;
  line-height: 1;
  margin-top: 2px;
}

/* --- Navigation --- */
.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav a {
  padding: 8px 18px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--color-gray-600);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

.nav a:hover,
.nav a.active {
  color: var(--color-primary);
  background: rgba(37, 99, 235, 0.06);
}

.nav-cta {
  margin-left: 12px;
  padding: 9px 22px !important;
  background: var(--color-primary) !important;
  color: var(--color-white) !important;
  border-radius: var(--radius-md) !important;
  font-weight: 600 !important;
}

.nav-cta:hover {
  background: var(--color-primary-dark) !important;
  color: var(--color-white) !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

/* --- Mobile Menu --- */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  width: 22px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  padding: 160px 0 100px;
  background: linear-gradient(170deg, #f8faff 0%, #eef4ff 40%, #f0fdf9 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(37,99,235,0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(6,214,160,0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px 6px 8px;
  background: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 28px;
  animation: fadeInUp 0.6s ease;
  box-shadow: var(--shadow-sm);
}

.hero-badge span {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 3px 10px;
  border-radius: 100px;
  font-size: 0.72rem;
  letter-spacing: 0.5px;
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--color-dark);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero h1 .text-gradient {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--color-gray-600);
  max-width: 600px;
  line-height: 1.8;
  margin-bottom: 40px;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  animation: fadeInUp 0.6s ease 0.3s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

.btn-outline {
  background: var(--color-white);
  color: var(--color-gray-700);
  border: 1.5px solid var(--color-gray-300);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-arrow {
  font-size: 1.1rem;
  transition: transform var(--transition-fast);
}

.btn:hover .btn-arrow {
  transform: translateX(3px);
}

/* --- Stats Bar --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 80px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: fadeInUp 0.6s ease 0.4s both;
}

.stat-item {
  padding: 32px 24px;
  text-align: center;
  position: relative;
}

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: var(--color-gray-200);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 0.88rem;
  color: var(--color-gray-500);
  font-weight: 500;
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services {
  padding: 120px 0;
  background: var(--color-white);
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.3rem;
  font-weight: 800;
  color: var(--color-dark);
  line-height: 1.3;
  margin-bottom: 18px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-gray-500);
  line-height: 1.7;
}

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

.service-card {
  background: var(--color-gray-50);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

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

.service-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(6,214,160,0.1));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.service-card h3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 14px;
}

.service-card p {
  font-size: 0.92rem;
  color: var(--color-gray-500);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap var(--transition-fast);
}

.service-link:hover {
  gap: 10px;
}

/* ============================================
   ABOUT / PROCESS SECTION
   ============================================ */
.about {
  padding: 120px 0;
  background: var(--color-bg);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-content .section-tag,
.about-content .section-title {
  text-align: left;
}

.about-content .section-desc {
  text-align: left;
  margin-bottom: 32px;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-feature {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.about-feature-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: 700;
  font-size: 0.85rem;
}

.about-feature h4 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.about-feature p {
  font-size: 0.88rem;
  color: var(--color-gray-500);
  line-height: 1.6;
}

/* --- Process Visual --- */
.process-visual {
  background: var(--color-dark);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  position: relative;
  overflow: hidden;
}

.process-visual::before {
  content: '';
  position: absolute;
  top: -50px;
  right: -50px;
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(37,99,235,0.2), transparent 70%);
  border-radius: 50%;
}

.process-visual h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 36px;
}

.process-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.process-step {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 16px 0;
  position: relative;
}

.process-step:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 18px;
  top: 52px;
  bottom: -16px;
  width: 2px;
  background: rgba(255,255,255,0.1);
}

.process-step-num {
  width: 38px;
  height: 38px;
  min-width: 38px;
  border: 2px solid var(--color-primary-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-primary-light);
  background: rgba(37,99,235,0.1);
  position: relative;
  z-index: 1;
}

.process-step-text {
  font-size: 0.92rem;
  color: rgba(255,255,255,0.8);
  font-weight: 500;
}

/* ============================================
   STRENGTHS SECTION
   ============================================ */
.strengths {
  padding: 120px 0;
  background: var(--color-white);
}

.strengths-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.strength-card {
  padding: 48px 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
  position: relative;
}

.strength-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.strength-card.featured {
  background: linear-gradient(135deg, var(--color-primary), #4f46e5);
  border: none;
  color: var(--color-white);
}

.strength-card.featured h3,
.strength-card.featured p {
  color: var(--color-white);
}

.strength-card.featured p {
  opacity: 0.85;
}

.strength-card h3 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 16px;
}

.strength-card p {
  font-size: 0.95rem;
  color: var(--color-gray-500);
  line-height: 1.7;
  margin-bottom: 24px;
}

.strength-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.strength-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  color: var(--color-gray-600);
}

.strength-card.featured .strength-list li {
  color: rgba(255,255,255,0.9);
}

.strength-list li::before {
  content: '✓';
  font-weight: 700;
  color: var(--color-accent);
  font-size: 0.85rem;
}

.strength-card.featured .strength-list li::before {
  color: var(--color-accent);
}

/* ============================================
   PORTFOLIO SECTION
   ============================================ */
.portfolio {
  padding: 120px 0;
  background: var(--color-bg);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.portfolio-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

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

.portfolio-thumb {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, #e0e7ff, #dbeafe);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.portfolio-thumb.thumb-blue {
  background: linear-gradient(135deg, #dbeafe, #bfdbfe);
}

.portfolio-thumb.thumb-green {
  background: linear-gradient(135deg, #d1fae5, #a7f3d0);
}

.portfolio-thumb.thumb-purple {
  background: linear-gradient(135deg, #e9d5ff, #c4b5fd);
}

.portfolio-thumb.thumb-amber {
  background: linear-gradient(135deg, #fef3c7, #fde68a);
}

.portfolio-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 12px;
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(8px);
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 0.5px;
}

.portfolio-year {
  position: absolute;
  top: 14px;
  right: 14px;
  padding: 4px 10px;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: 0.5px;
}

.portfolio-info {
  padding: 28px 24px;
}

.portfolio-info h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 10px;
}

.portfolio-info p {
  font-size: 0.88rem;
  color: var(--color-gray-500);
  line-height: 1.6;
}

.portfolio-techs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}

.portfolio-tech-badge {
  padding: 3px 10px;
  background: var(--color-gray-100);
  border-radius: 100px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-gray-600);
}

/* --- Company History --- */
.history {
  padding: 100px 0;
  background: var(--color-white);
}

.history-timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  padding-left: 40px;
}

.history-timeline::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
}

.history-item {
  position: relative;
  padding: 0 0 40px 32px;
}

.history-item:last-child {
  padding-bottom: 0;
}

.history-item::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 6px;
  width: 16px;
  height: 16px;
  background: var(--color-white);
  border: 3px solid var(--color-primary);
  border-radius: 50%;
  z-index: 1;
}

.history-item.milestone::before {
  background: var(--color-primary);
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(37,99,235,0.15);
}

.history-year {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
  letter-spacing: 0.5px;
}

.history-text {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-dark);
  line-height: 1.5;
}

.history-desc {
  font-size: 0.88rem;
  color: var(--color-gray-500);
  margin-top: 4px;
  line-height: 1.5;
}

/* ============================================
   TECH STACK SECTION
   ============================================ */
.tech-stack {
  padding: 100px 0;
  background: var(--color-dark);
  color: var(--color-white);
}

.tech-stack .section-tag {
  color: var(--color-accent);
}

.tech-stack .section-title {
  color: var(--color-white);
}

.tech-stack .section-desc {
  color: rgba(255,255,255,0.6);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.tech-item {
  text-align: center;
  padding: 32px 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.tech-item:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-4px);
}

.tech-item-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.tech-item h4 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.tech-item p {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
}

/* ============================================
   CTA SECTION
   ============================================ */
.cta {
  padding: 100px 0;
  background: var(--color-white);
}

.cta-box {
  background: linear-gradient(135deg, #2563eb, #4f46e5);
  border-radius: var(--radius-xl);
  padding: 72px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255,255,255,0.1), transparent 70%);
  border-radius: 50%;
}

.cta-box::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(6,214,160,0.15), transparent 70%);
  border-radius: 50%;
}

.cta-box h2 {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 18px;
  position: relative;
  z-index: 1;
}

.cta-box p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 36px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}

.cta-box .btn {
  position: relative;
  z-index: 1;
}

.btn-white {
  background: var(--color-white);
  color: var(--color-primary);
  font-weight: 700;
}

.btn-white:hover {
  background: var(--color-gray-50);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--color-gray-900);
  color: rgba(255,255,255,0.7);
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .logo {
  color: var(--color-white);
  margin-bottom: 18px;
}

.footer-brand .logo-icon {
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
}

.footer-desc {
  font-size: 0.88rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
  margin-bottom: 20px;
}

.footer-contact-info {
  font-size: 0.85rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.4);
}

.footer h4 {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.5);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-primary-light);
}

.footer-bottom {
  padding: 28px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.35);
}

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

.footer-legal a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.35);
}

.footer-legal a:hover {
  color: rgba(255,255,255,0.7);
}

.footer-company-info {
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.05);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.25);
  text-align: center;
  line-height: 1.8;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.6rem; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .portfolio-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { gap: 48px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 768px) {
  :root { --header-height: 64px; }

  .nav { display: none; }

  .mobile-menu-btn { display: flex; }

  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-lg);
  }

  .nav.open .nav-cta {
    margin-left: 0;
    text-align: center;
    margin-top: 8px;
  }

  .hero { padding: 120px 0 80px; }
  .hero h1 { font-size: 2rem; }
  .hero-desc { font-size: 1rem; }
  .hero-buttons { flex-direction: column; }
  .hero-buttons .btn { justify-content: center; }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 48px;
  }

  .stat-item:nth-child(2)::after { display: none; }

  .section-title { font-size: 1.8rem; }

  .services-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .strengths-grid { grid-template-columns: 1fr; }
  .portfolio-grid { grid-template-columns: 1fr; }
  .tech-grid { grid-template-columns: repeat(2, 1fr); }

  .cta-box { padding: 48px 28px; }
  .cta-box h2 { font-size: 1.6rem; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.7rem; }
  .stat-number { font-size: 1.8rem; }
  .section-title { font-size: 1.5rem; }
  .process-visual { padding: 32px 24px; }
  .strength-card { padding: 32px 24px; }
}