/* ============================================================
   CHEONGRIN (청린) - Corporate Website Styles
   소프트웨어 개발 · 공급 전문 기업
============================================================ */

/* ── CSS Variables ── */
:root {
  --primary-50:  #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;

  --cyan-400:    #38bdf8;
  --cyan-500:    #0ea5e9;
  --cyan-600:    #0284c7;

  --gray-50:     #f8fafc;
  --gray-100:    #f1f5f9;
  --gray-200:    #e2e8f0;
  --gray-300:    #cbd5e1;
  --gray-400:    #94a3b8;
  --gray-500:    #64748b;
  --gray-600:    #475569;
  --gray-700:    #334155;
  --gray-800:    #1e293b;
  --gray-900:    #0f172a;

  --white:       #ffffff;
  --black:       #000000;

  --gradient-primary: linear-gradient(135deg, var(--cyan-500) 0%, var(--primary-600) 50%, var(--primary-800) 100%);
  --gradient-hero:    linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0f172a 100%);
  --gradient-card:    linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.02) 100%);

  --shadow-sm:  0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md:  0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg:  0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);
  --shadow-xl:  0 20px 25px rgba(0,0,0,.1), 0 10px 10px rgba(0,0,0,.04);
  --shadow-blue: 0 8px 30px rgba(37,99,235,.25);

  --border-radius-sm:  6px;
  --border-radius:    12px;
  --border-radius-lg: 20px;
  --border-radius-xl: 28px;

  --font-sans: 'Noto Sans KR', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-en:   'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  --transition: .25s cubic-bezier(.4,0,.2,1);
  --transition-slow: .5s cubic-bezier(.4,0,.2,1);

  --nav-height: 72px;
  --container-max: 1200px;
}

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

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

body {
  font-family: var(--font-sans);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

.section { padding: 100px 0; }

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  background: var(--primary-50);
  color: var(--primary-600);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 16px;
  border: 1px solid var(--primary-100);
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--gray-900);
  letter-spacing: -.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.0625rem;
  color: var(--gray-500);
  max-width: 560px;
  margin: 0 auto;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--border-radius);
  font-size: .9375rem;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(37,99,235,.4);
}
.btn-primary:active { transform: translateY(0); }

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,.4);
  backdrop-filter: blur(4px);
}
.btn-outline:hover {
  background: rgba(255,255,255,.1);
  border-color: rgba(255,255,255,.7);
  transform: translateY(-2px);
}

.btn-full { width: 100%; justify-content: center; }

/* ── Reveal Animation ── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================================
   NAVIGATION
============================================================= */
#main-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  transition: all var(--transition);
}

.navbar {
  background: transparent;
  transition: all var(--transition);
}

#main-header.scrolled .navbar {
  background: rgba(15,23,42,.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255,255,255,.08), 0 4px 20px rgba(0,0,0,.3);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

/* Logo */
.nav-logo, .footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-svg { width: 44px; height: 44px; }

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo-kr {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -.01em;
}

.logo-en {
  font-size: .625rem;
  font-weight: 600;
  color: var(--cyan-400);
  letter-spacing: .12em;
  margin-top: 2px;
}

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

.nav-link {
  padding: 8px 16px;
  border-radius: var(--border-radius-sm);
  font-size: .9rem;
  font-weight: 500;
  color: rgba(255,255,255,.75);
  transition: all var(--transition);
  position: relative;
}

.nav-link:hover { color: var(--white); background: rgba(255,255,255,.08); }

.nav-link.active {
  color: var(--cyan-400);
  background: rgba(14,165,233,.1);
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--border-radius-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* =============================================================
   HERO SECTION
============================================================= */
.hero-section {
  min-height: 100vh;
  background: var(--gradient-hero);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-height);
}

/* Animated BG Shapes */
.hero-bg-shapes { position: absolute; inset: 0; pointer-events: none; }

.shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  animation: floatShape 8s ease-in-out infinite;
}

.shape-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(37,99,235,.3), transparent 70%);
  top: -200px; right: -100px;
  animation-delay: 0s;
}

.shape-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(14,165,233,.2), transparent 70%);
  bottom: -100px; left: -50px;
  animation-delay: -3s;
}

.shape-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(99,102,241,.2), transparent 70%);
  top: 40%; left: 40%;
  animation-delay: -5s;
}

@keyframes floatShape {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(20px, -30px) scale(1.05); }
  66%       { transform: translate(-15px, 15px) scale(.95); }
}

/* Particles */
.particles { position: absolute; inset: 0; }
.particle {
  position: absolute;
  width: 3px; height: 3px;
  background: rgba(148,197,255,.5);
  border-radius: 50%;
  animation: floatParticle linear infinite;
}

@keyframes floatParticle {
  0%   { transform: translateY(100vh) translateX(0); opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 1; }
  100% { transform: translateY(-10vh) translateX(50px); opacity: 0; }
}

/* Hero Container */
.hero-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 80px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 64px;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(14,165,233,.15);
  border: 1px solid rgba(14,165,233,.3);
  color: var(--cyan-400);
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .06em;
  padding: 8px 16px;
  border-radius: 100px;
  margin-bottom: 24px;
  animation: fadeInDown .8s ease both;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -.03em;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  animation: fadeInDown .8s .1s ease both;
}

.title-kr {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.title-divider {
  display: block;
  width: 3px;
  height: .8em;
  background: var(--gradient-primary);
  border-radius: 2px;
  opacity: .6;
}

.title-en {
  font-family: var(--font-en);
  font-size: .65em;
  letter-spacing: .1em;
  color: rgba(255,255,255,.6);
  align-self: flex-end;
  margin-bottom: .1em;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: rgba(255,255,255,.7);
  margin-bottom: 40px;
  line-height: 1.8;
  animation: fadeInDown .8s .2s ease both;
}

.hero-subtitle em {
  font-style: normal;
  font-size: .875em;
  color: rgba(255,255,255,.45);
  display: block;
  margin-top: 4px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
  animation: fadeInDown .8s .3s ease both;
}

.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  animation: fadeInDown .8s .4s ease both;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--border-radius);
  padding: 20px 28px;
  backdrop-filter: blur(8px);
  width: fit-content;
}

.stat-item {
  text-align: center;
  padding: 0 24px;
}

.stat-number {
  font-size: 1.875rem;
  font-weight: 800;
  color: var(--white);
  font-family: var(--font-en);
}

.stat-unit {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--cyan-400);
}

.stat-label {
  display: block;
  font-size: .75rem;
  color: rgba(255,255,255,.5);
  margin-top: 4px;
  white-space: nowrap;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,.15);
  flex-shrink: 0;
}

/* Hero Visual */
.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  animation: fadeInRight .9s .2s ease both;
}

.hero-logo-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  position: relative;
}

.hero-logo-svg {
  width: 280px;
  height: 280px;
  filter: drop-shadow(0 0 40px rgba(37,99,235,.5));
  animation: rotateSlow 30s linear infinite;
}

@keyframes rotateSlow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* stop inner elements from rotating */
.hero-logo-svg path,
.hero-logo-svg polyline,
.hero-logo-svg line,
.hero-logo-svg circle:last-of-type {
  animation: counterRotate 30s linear infinite;
  transform-origin: 100px 100px;
}

@keyframes counterRotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(-360deg); }
}

.hero-logo-text {
  text-align: center;
}

.hl-kr {
  display: block;
  font-size: 2.5rem;
  font-weight: 900;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -.02em;
}

.hl-sub {
  display: block;
  font-size: .875rem;
  color: rgba(255,255,255,.55);
  margin: 4px 0 6px;
  letter-spacing: .04em;
}

.hl-en {
  display: block;
  font-family: var(--font-en);
  font-size: 1rem;
  font-weight: 700;
  color: var(--cyan-400);
  letter-spacing: .2em;
}

/* Scroll Hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,.4);
  font-size: .75rem;
  letter-spacing: .08em;
  animation: fadeIn 1s 1s ease both;
}

.bounce {
  animation: bounceAnim 2s infinite;
}

@keyframes bounceAnim {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(6px); }
  60% { transform: translateY(3px); }
}

/* =============================================================
   ABOUT SECTION
============================================================= */
.about-section { background: var(--white); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
  align-items: start;
}

.about-subtitle {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 20px;
}

.about-story p {
  color: var(--gray-600);
  margin-bottom: 16px;
  font-size: .9875rem;
}

.about-values {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.value-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px;
  border-radius: var(--border-radius);
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
}

.value-item:hover {
  background: var(--primary-50);
  border-color: var(--primary-100);
  transform: translateX(4px);
}

.value-item i {
  font-size: 1.25rem;
  color: var(--primary-600);
  margin-top: 2px;
  width: 20px;
  flex-shrink: 0;
}

.value-item strong {
  display: block;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 2px;
}

.value-item span {
  font-size: .85rem;
  color: var(--gray-500);
}

/* CEO Card */
.ceo-card {
  background: var(--gradient-hero);
  border-radius: var(--border-radius-lg);
  padding: 40px 32px;
  border: 1px solid rgba(255,255,255,.08);
  position: relative;
  overflow: hidden;
}

.ceo-card::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(37,99,235,.3), transparent 70%);
  border-radius: 50%;
  transform: translate(50%, -50%);
}

.ceo-avatar {
  width: 80px; height: 80px;
  margin-bottom: 20px;
}

.ceo-avatar-inner {
  width: 80px; height: 80px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--white);
  box-shadow: var(--shadow-blue);
}

.ceo-role {
  display: block;
  font-size: .75rem;
  font-weight: 600;
  color: var(--cyan-400);
  letter-spacing: .1em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.ceo-name {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 16px;
  letter-spacing: -.02em;
}

.ceo-quote {
  font-size: .9rem;
  color: rgba(255,255,255,.65);
  line-height: 1.8;
  font-style: italic;
  border-left: 3px solid var(--primary-500);
  padding-left: 16px;
  margin-bottom: 16px;
}

.ceo-name-en {
  font-family: var(--font-en);
  font-size: .8125rem;
  color: rgba(255,255,255,.4);
  letter-spacing: .06em;
}

/* Company Info Grid */
.company-info-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.info-card {
  background: var(--gray-50);
  border: 1px solid var(--gray-100);
  border-radius: var(--border-radius);
  padding: 24px 20px;
  text-align: center;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.info-card:hover {
  border-color: var(--primary-300);
  background: var(--primary-50);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.info-card i {
  font-size: 1.5rem;
  color: var(--primary-600);
  margin-bottom: 4px;
}

.info-card strong {
  font-size: .75rem;
  font-weight: 700;
  color: var(--gray-500);
  letter-spacing: .06em;
  text-transform: uppercase;
}

.info-card span {
  font-size: .9rem;
  font-weight: 600;
  color: var(--gray-800);
}

/* =============================================================
   SERVICES SECTION
============================================================= */
.services-section {
  background: var(--gray-50);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.service-card {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  padding: 36px 32px;
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.service-card:hover {
  border-color: var(--primary-200);
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

.service-card:hover::before { transform: scaleX(1); }

.service-card--featured {
  background: var(--gradient-hero);
  border-color: rgba(255,255,255,.08);
  color: var(--white);
}

.service-card--featured::before {
  background: linear-gradient(90deg, var(--cyan-400), var(--primary-400));
  transform: scaleX(1);
}

.service-card--featured .service-title { color: var(--white); }
.service-card--featured .service-desc  { color: rgba(255,255,255,.65); }
.service-card--featured .service-list li { color: rgba(255,255,255,.8); }
.service-card--featured .service-list i { color: var(--cyan-400); }

.service-badge {
  position: absolute;
  top: 20px; right: 20px;
  background: var(--cyan-500);
  color: var(--white);
  font-size: .6875rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 100px;
  letter-spacing: .06em;
}

.service-icon {
  width: 60px; height: 60px;
  border-radius: var(--border-radius);
  background: var(--primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--primary-600);
  margin-bottom: 20px;
  transition: all var(--transition);
}

.service-card--featured .service-icon {
  background: rgba(255,255,255,.1);
  color: var(--cyan-400);
}

.service-card:hover .service-icon {
  background: var(--gradient-primary);
  color: var(--white);
  transform: scale(1.05);
}

.service-card--featured:hover .service-icon {
  background: rgba(255,255,255,.2);
  color: var(--white);
}

.service-title {
  font-size: 1.1875rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.service-desc {
  font-size: .9rem;
  color: var(--gray-500);
  margin-bottom: 20px;
  line-height: 1.7;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.service-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .875rem;
  color: var(--gray-600);
}

.service-list i {
  color: var(--primary-500);
  font-size: .75rem;
  flex-shrink: 0;
}

/* Tech Stack */
.tech-stack {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  padding: 36px 40px;
  border: 1px solid var(--gray-200);
  text-align: center;
}

.tech-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--gray-700);
  margin-bottom: 20px;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.tech-tag {
  background: var(--primary-50);
  color: var(--primary-700);
  font-size: .8125rem;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 100px;
  border: 1px solid var(--primary-100);
  transition: all var(--transition);
}

.tech-tag:hover {
  background: var(--gradient-primary);
  color: var(--white);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-blue);
}

/* =============================================================
   PORTFOLIO SECTION
============================================================= */
.portfolio-section { background: var(--white); }

.portfolio-filter {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.filter-btn {
  padding: 9px 22px;
  border-radius: 100px;
  font-size: .875rem;
  font-weight: 600;
  color: var(--gray-500);
  border: 1.5px solid var(--gray-200);
  background: var(--white);
  transition: all var(--transition);
}

.filter-btn:hover {
  color: var(--primary-600);
  border-color: var(--primary-300);
  background: var(--primary-50);
}

.filter-btn.active {
  background: var(--gradient-primary);
  color: var(--white);
  border-color: transparent;
  box-shadow: var(--shadow-blue);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.portfolio-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-200);
}

.portfolio-card.hidden {
  display: none;
}

.portfolio-img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.portfolio-img-inner {
  width: 100%; height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: rgba(255,255,255,.9);
  transition: transform var(--transition);
}

.portfolio-card:hover .portfolio-img-inner { transform: scale(1.05); }

.pf-color-1 { background: linear-gradient(135deg, #1e40af, #2563eb); }
.pf-color-2 { background: linear-gradient(135deg, #0369a1, #0ea5e9); }
.pf-color-3 { background: linear-gradient(135deg, #0f766e, #14b8a6); }
.pf-color-4 { background: linear-gradient(135deg, #7c3aed, #a78bfa); }
.pf-color-5 { background: linear-gradient(135deg, #be185d, #ec4899); }
.pf-color-6 { background: linear-gradient(135deg, #1e3a5f, #0ea5e9); }

.portfolio-content { padding: 24px; }

.portfolio-category {
  display: inline-block;
  font-size: .6875rem;
  font-weight: 700;
  color: var(--primary-600);
  background: var(--primary-50);
  padding: 3px 10px;
  border-radius: 100px;
  margin-bottom: 10px;
  letter-spacing: .06em;
}

.portfolio-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 8px;
  line-height: 1.4;
}

.portfolio-desc {
  font-size: .85rem;
  color: var(--gray-500);
  margin-bottom: 16px;
  line-height: 1.6;
}

.portfolio-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.portfolio-tech span {
  font-size: .7rem;
  font-weight: 600;
  color: var(--gray-600);
  background: var(--gray-100);
  padding: 3px 10px;
  border-radius: 4px;
}

/* =============================================================
   WHY SECTION
============================================================= */
.why-section {
  background: linear-gradient(160deg, var(--primary-900) 0%, var(--gray-900) 100%);
  position: relative;
  overflow: hidden;
}

.why-section::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(37,99,235,.2), transparent 70%);
  border-radius: 50%;
}

.why-section .section-tag {
  background: rgba(255,255,255,.1);
  color: var(--cyan-400);
  border-color: rgba(255,255,255,.15);
}

.why-section .section-title { color: var(--white); }
.why-section .section-desc  { color: rgba(255,255,255,.55); }

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
  z-index: 1;
}

.why-card {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--border-radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
  backdrop-filter: blur(8px);
}

.why-card:hover {
  background: rgba(255,255,255,.1);
  border-color: rgba(255,255,255,.2);
  transform: translateY(-4px);
}

.why-icon {
  width: 56px; height: 56px;
  border-radius: var(--border-radius);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.375rem;
  color: var(--white);
  margin: 0 auto 20px;
  box-shadow: var(--shadow-blue);
  transition: transform var(--transition);
}

.why-card:hover .why-icon { transform: scale(1.1) rotate(-5deg); }

.why-card h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}

.why-card p {
  font-size: .875rem;
  color: rgba(255,255,255,.55);
  line-height: 1.7;
}

/* =============================================================
   CONTACT SECTION
============================================================= */
.contact-section { background: var(--gray-50); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}

.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: 12px;
}

.contact-info > p {
  font-size: .9375rem;
  color: var(--gray-500);
  margin-bottom: 32px;
  line-height: 1.7;
}

.contact-items {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px;
  background: var(--white);
  border-radius: var(--border-radius);
  border: 1px solid var(--gray-100);
  transition: all var(--transition);
}

.contact-item:hover {
  border-color: var(--primary-200);
  background: var(--primary-50);
  transform: translateX(4px);
}

.contact-item-icon {
  width: 44px; height: 44px;
  border-radius: var(--border-radius-sm);
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1rem;
  flex-shrink: 0;
}

.contact-item-text strong {
  display: block;
  font-size: .75rem;
  font-weight: 700;
  color: var(--gray-500);
  letter-spacing: .06em;
  text-transform: uppercase;
  margin-bottom: 3px;
}

.contact-item-text span {
  font-size: .9375rem;
  font-weight: 500;
  color: var(--gray-800);
}

.business-hours {
  background: var(--primary-50);
  border: 1px solid var(--primary-100);
  border-radius: var(--border-radius);
  padding: 16px 20px;
}

.business-hours h4 {
  font-size: .875rem;
  font-weight: 700;
  color: var(--primary-700);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.business-hours p {
  font-size: .875rem;
  color: var(--primary-600);
}

/* Contact Form */
.contact-form-wrap {
  background: var(--white);
  border-radius: var(--border-radius-lg);
  padding: 40px;
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: .8125rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: 7px;
  letter-spacing: .02em;
}

.form-group label span {
  color: var(--primary-500);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 11px 16px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--border-radius-sm);
  font-size: .9375rem;
  color: var(--gray-800);
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--gray-300);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--primary-400);
  box-shadow: 0 0 0 3px rgba(37,99,235,.1);
}

.form-group textarea { resize: vertical; min-height: 120px; }

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

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: .85rem;
  color: var(--gray-600);
}

.checkbox-label input[type="checkbox"] {
  width: 18px; height: 18px;
  accent-color: var(--primary-600);
  cursor: pointer;
}

.form-feedback {
  margin-top: 12px;
  padding: 12px 16px;
  border-radius: var(--border-radius-sm);
  font-size: .875rem;
  font-weight: 500;
  display: none;
}

.form-feedback.success {
  display: block;
  background: #f0fdf4;
  color: #166534;
  border: 1px solid #bbf7d0;
}

.form-feedback.error {
  display: block;
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* =============================================================
   FOOTER
============================================================= */
.site-footer { background: var(--gray-900); }

.footer-top { padding: 64px 0; }

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
  gap: 48px;
}

.footer-tagline {
  font-size: .9rem;
  color: rgba(255,255,255,.45);
  margin: 16px 0 8px;
  line-height: 1.6;
}

.footer-business {
  font-size: .75rem;
  color: var(--cyan-400);
  font-weight: 600;
  letter-spacing: .06em;
}

.footer-grid h4 {
  font-size: .8125rem;
  font-weight: 700;
  color: rgba(255,255,255,.85);
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.footer-nav ul,
.footer-services ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a,
.footer-services li {
  font-size: .875rem;
  color: rgba(255,255,255,.45);
  transition: color var(--transition);
}

.footer-nav a:hover { color: var(--cyan-400); }

.footer-contact address {
  font-style: normal;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-contact p {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .875rem;
  color: rgba(255,255,255,.45);
}

.footer-contact i {
  color: var(--primary-400);
  width: 16px;
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.06);
  padding: 20px 0;
  text-align: center;
}

.footer-bottom p {
  font-size: .8125rem;
  color: rgba(255,255,255,.3);
}

/* =============================================================
   SCROLL TO TOP
============================================================= */
.scroll-top {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: var(--white);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-blue);
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: all var(--transition);
  z-index: 999;
}

.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.scroll-top:hover { transform: translateY(-3px); box-shadow: 0 12px 30px rgba(37,99,235,.5); }

/* =============================================================
   KEYFRAME ANIMATIONS
============================================================= */
@keyframes fadeIn        { from { opacity: 0; }                    to { opacity: 1; } }
@keyframes fadeInDown    { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInRight   { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }

/* =============================================================
   RESPONSIVE
============================================================= */

/* Tablet */
@media (max-width: 1024px) {
  .services-grid     { grid-template-columns: 1fr 1fr; }
  .portfolio-grid    { grid-template-columns: repeat(2, 1fr); }
  .why-grid          { grid-template-columns: repeat(2, 1fr); }
  .footer-grid       { grid-template-columns: repeat(2, 1fr); }
  .company-info-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 48px;
  }

  .hero-cta        { justify-content: center; }
  .hero-stats      { margin: 0 auto; }
  .hero-visual     { order: -1; }
  .hero-logo-svg   { width: 200px; height: 200px; }

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

/* Mobile */
@media (max-width: 640px) {
  .section { padding: 72px 0; }

  .nav-menu {
    position: fixed;
    top: var(--nav-height); left: 0; right: 0;
    background: rgba(15,23,42,.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 8px;
    transform: translateY(-110%);
    opacity: 0;
    transition: all var(--transition);
    border-bottom: 1px solid rgba(255,255,255,.08);
  }

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

  .nav-link { width: 100%; padding: 12px 16px; }
  .nav-toggle { display: flex; }

  .hero-title { font-size: 2.25rem; gap: 12px; }
  .title-divider { display: none; }
  .hero-stats {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0;
    padding: 16px;
  }
  .stat-item { padding: 8px 16px; }

  .services-grid     { grid-template-columns: 1fr; }
  .portfolio-grid    { grid-template-columns: 1fr; }
  .why-grid          { grid-template-columns: 1fr; }
  .company-info-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid       { grid-template-columns: 1fr; gap: 32px; }
  .form-row          { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 24px; }

  .hero-logo-svg { width: 160px; height: 160px; }
  .scroll-top    { bottom: 20px; right: 20px; width: 44px; height: 44px; }
}

@media (max-width: 400px) {
  .hero-cta { flex-direction: column; }
  .btn      { width: 100%; justify-content: center; }
}