/* ============================================================
   Digireal - Brand Stylesheet
   Brand Colors:
   - Cyan Blue   #00B8D4 (Primary)
   - Electric Blue #0066FF (Accent)
   - Royal Blue  #0052CC (Secondary/BG)
   ============================================================ */

:root {
  --cyan: #00B8D4;
  --electric: #0066FF;
  --royal: #0052CC;
  --gradient: linear-gradient(90deg, #00B8D4 0%, #0066FF 50%, #0052CC 100%);
  --gradient-soft: linear-gradient(135deg, #00B8D4 0%, #0066FF 60%, #0052CC 100%);

  --white: #ffffff;
  --light-gray: #f5f7fa;
  --light-gray-2: #eef2f7;
  --dark-gray: #1f2733;
  --text: #333333;
  --text-muted: #666666;
  --border: #e3e9f0;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 4px 16px rgba(0, 82, 204, 0.06);
  --shadow-md: 0 12px 32px rgba(0, 82, 204, 0.10);
  --shadow-lg: 0 24px 60px rgba(0, 82, 204, 0.16);

  --header-h: 72px;
  --maxw: 1180px;

  --font-kr: 'Noto Sans KR', sans-serif;
  --font-en: 'Poppins', 'Noto Sans KR', sans-serif;
}

/* ---------- Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
body {
  font-family: var(--font-kr);
  color: var(--text);
  line-height: 1.65;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

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

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 12px 24px;
  border-radius: 50px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.btn-lg { padding: 15px 32px; font-size: 1.02rem; }
.btn-block { width: 100%; justify-content: center; }

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 8px 20px rgba(0, 102, 255, 0.28);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0, 102, 255, 0.38); }

.btn-outline {
  background: transparent;
  color: var(--royal);
  border-color: var(--electric);
}
.btn-outline:hover { background: var(--electric); color: #fff; transform: translateY(-2px); }

.btn-white {
  background: #fff;
  color: var(--royal);
}
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0,0,0,0.18); }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  z-index: 1000;
  transition: all 0.3s ease;
}
.site-header.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark { height: 36px; width: auto; }
.logo-text {
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 1.5rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.main-nav { display: flex; align-items: center; gap: 32px; }
.main-nav ul { display: flex; gap: 28px; }
.main-nav a {
  font-weight: 500;
  font-size: 0.97rem;
  color: var(--dark-gray);
  position: relative;
  transition: color 0.2s;
}
.main-nav ul a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 2px;
  background: var(--gradient);
  transition: width 0.25s ease;
}
.main-nav ul a:hover { color: var(--electric); }
.main-nav ul a:hover::after { width: 100%; }
.nav-cta { padding: 9px 20px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 26px; height: 3px;
  background: var(--royal);
  border-radius: 3px;
  transition: all 0.3s ease;
}
.nav-toggle.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--header-h) + 70px) 0 90px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(0,184,212,0.14), transparent 45%),
    radial-gradient(circle at 10% 80%, rgba(0,102,255,0.12), transparent 45%),
    linear-gradient(180deg, #f7fbff 0%, #ffffff 100%);
  z-index: -1;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 50px;
  align-items: center;
}
.hero-badge {
  display: inline-block;
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--royal);
  background: rgba(0, 184, 212, 0.12);
  border: 1px solid rgba(0, 184, 212, 0.3);
  padding: 7px 16px;
  border-radius: 50px;
  margin-bottom: 22px;
}
.hero-title {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -1px;
  color: var(--dark-gray);
  margin-bottom: 22px;
}
.hero-desc {
  font-size: 1.08rem;
  color: var(--text-muted);
  margin-bottom: 34px;
  max-width: 560px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 44px; }
.hero-stats {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  padding-top: 26px;
}
.hero-stats li { display: flex; flex-direction: column; }
.hero-stats strong {
  font-family: var(--font-en);
  font-size: 1.8rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-stats span { font-size: 0.9rem; color: var(--text-muted); }

.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-card-glow {
  position: absolute;
  width: 360px; height: 360px;
  background: var(--gradient-soft);
  filter: blur(70px);
  opacity: 0.28;
  border-radius: 50%;
  animation: floatGlow 6s ease-in-out infinite;
}
.hero-logo {
  position: relative;
  width: min(420px, 90%);
  filter: drop-shadow(0 20px 40px rgba(0, 82, 204, 0.18));
  animation: floatLogo 5s ease-in-out infinite;
}
@keyframes floatLogo { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
@keyframes floatGlow { 0%,100% { transform: scale(1); } 50% { transform: scale(1.12); } }

/* ---------- Keywords Bar ---------- */
.keywords-bar {
  background: var(--gradient);
  padding: 20px 0;
  overflow: hidden;
}
.keywords-track {
  display: flex;
  gap: 44px;
  flex-wrap: wrap;
  justify-content: center;
}
.keywords-track span {
  color: rgba(255,255,255,0.95);
  font-weight: 500;
  font-size: 0.98rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.keywords-track i { font-size: 1.05rem; }

/* ---------- Section Base ---------- */
.section { padding: 96px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.eyebrow {
  font-family: var(--font-en);
  font-weight: 700;
  letter-spacing: 2px;
  font-size: 0.8rem;
  color: var(--electric);
  display: block;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.5rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--dark-gray);
  letter-spacing: -0.5px;
  margin-bottom: 18px;
}
.section-sub { font-size: 1.05rem; color: var(--text-muted); }

/* ---------- About ---------- */
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.about-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 38px 30px;
  text-align: center;
  transition: all 0.3s ease;
}
.about-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(0,184,212,0.4); }
.about-icon {
  width: 70px; height: 70px;
  margin: 0 auto 22px;
  display: grid; place-items: center;
  background: var(--gradient);
  color: #fff;
  font-size: 1.7rem;
  border-radius: 20px;
  box-shadow: 0 10px 24px rgba(0, 102, 255, 0.28);
}
.about-card h3 { font-size: 1.2rem; font-weight: 700; color: var(--dark-gray); margin-bottom: 12px; }
.about-card p { color: var(--text-muted); font-size: 0.98rem; }

/* ---------- Solutions ---------- */
.solutions { background: var(--light-gray); }
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.solution-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 34px 26px;
  box-shadow: var(--shadow-sm);
  border-top: 4px solid transparent;
  transition: all 0.3s ease;
}
.solution-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-top-color: var(--cyan);
}
.solution-icon {
  width: 60px; height: 60px;
  display: grid; place-items: center;
  background: rgba(0, 184, 212, 0.12);
  color: var(--electric);
  font-size: 1.5rem;
  border-radius: 16px;
  margin-bottom: 20px;
}
.solution-card h3 { font-size: 1.22rem; font-weight: 700; color: var(--dark-gray); margin-bottom: 12px; }
.solution-card > p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 18px; }
.solution-points li {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: 0.9rem; color: var(--text);
  padding: 5px 0;
}
.solution-points i { color: var(--cyan); margin-top: 4px; font-size: 0.8rem; }

/* ---------- Products ---------- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.product-item {
  position: relative;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 34px 32px;
  transition: all 0.3s ease;
  overflow: hidden;
}
.product-item::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 5px;
  background: var(--gradient);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s ease;
}
.product-item:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.product-item:hover::before { transform: scaleY(1); }
.product-badge {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--electric);
  background: rgba(0, 102, 255, 0.1);
  padding: 4px 12px;
  border-radius: 50px;
  margin-bottom: 16px;
}
.product-item h3 {
  font-size: 1.18rem; font-weight: 700;
  color: var(--dark-gray); margin-bottom: 10px;
  display: flex; align-items: center; gap: 10px;
}
.product-item h3 i { color: var(--cyan); }
.product-item p { color: var(--text-muted); font-size: 0.96rem; }

/* ---------- Process ---------- */
.process { background: var(--light-gray); }
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.process-step {
  position: relative;
  background: var(--white);
  border-radius: var(--radius);
  padding: 36px 26px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}
.process-step:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.step-num {
  font-family: var(--font-en);
  font-size: 2.4rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
  margin-bottom: 14px;
}
.process-step h3 { font-size: 1.15rem; font-weight: 700; color: var(--dark-gray); margin-bottom: 10px; }
.process-step p { color: var(--text-muted); font-size: 0.95rem; }

/* ---------- CTA Band ---------- */
.cta-band {
  background: var(--gradient);
  padding: 64px 0;
  color: #fff;
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
}
.cta-band h2 { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 800; margin-bottom: 8px; }
.cta-band p { font-size: 1.05rem; opacity: 0.95; }

/* ---------- Contact ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}
.contact-info .section-title { text-align: left; }
.contact-info .section-sub { text-align: left; margin-bottom: 30px; }
.contact-info .section-head { text-align: left; }
.contact-list { margin-bottom: 28px; }
.contact-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
}
.ci-icon {
  flex-shrink: 0;
  width: 46px; height: 46px;
  display: grid; place-items: center;
  background: rgba(0, 184, 212, 0.12);
  color: var(--electric);
  border-radius: 12px;
  font-size: 1.1rem;
}
.contact-list div { display: flex; flex-direction: column; }
.contact-list strong { color: var(--dark-gray); font-size: 1rem; }
.contact-list a { color: var(--dark-gray); font-weight: 500; transition: color 0.2s; }
.contact-list a:hover { color: var(--electric); }
.contact-list small { color: var(--text-muted); font-size: 0.82rem; }
.contact-tagline {
  font-weight: 500;
  color: var(--electric);
  font-size: 0.95rem;
}

.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 38px 34px;
  box-shadow: var(--shadow-md);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--dark-gray);
  margin-bottom: 8px;
}
.form-group label span { color: var(--cyan); }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-kr);
  font-size: 0.96rem;
  color: var(--text);
  background: var(--light-gray);
  transition: all 0.2s ease;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--electric);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(0, 102, 255, 0.12);
}
.form-group textarea { resize: vertical; }
.form-status {
  margin-top: 14px;
  font-size: 0.92rem;
  text-align: center;
  min-height: 20px;
}
.form-status.success { color: #0a8f4f; }
.form-status.error { color: #d32f2f; }

/* ---------- Footer ---------- */
.site-footer { background: #0a1626; color: rgba(255,255,255,0.78); padding-top: 60px; }
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
}
.footer-logo { height: 64px; width: auto; margin-bottom: 16px; filter: brightness(1.15); }
.footer-brand p { font-size: 0.96rem; margin-bottom: 6px; }
.footer-keywords { font-size: 0.85rem; color: rgba(255,255,255,0.55); }
.footer-nav { display: flex; flex-direction: column; gap: 12px; }
.footer-nav a { font-size: 0.95rem; transition: color 0.2s; }
.footer-nav a:hover { color: var(--cyan); }
.footer-contact p {
  font-size: 0.93rem;
  margin-bottom: 10px;
  display: flex; align-items: center; gap: 10px;
}
.footer-contact i { color: var(--cyan); width: 16px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 22px 0;
  text-align: center;
}
.footer-bottom p { font-size: 0.86rem; color: rgba(255,255,255,0.5); }

/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  bottom: 26px; right: 26px;
  width: 48px; height: 48px;
  display: grid; place-items: center;
  background: var(--gradient);
  color: #fff;
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all 0.3s ease;
  z-index: 900;
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-3px); }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 992px) {
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-stats { justify-content: center; }
  .hero-visual { order: -1; margin-bottom: 10px; }
  .hero-logo { width: min(300px, 70%); }
  .about-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .solutions-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: var(--header-h); left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    gap: 0;
    padding: 20px 24px 28px;
    box-shadow: var(--shadow-md);
    border-top: 1px solid var(--border);
    transform: translateY(-150%);
    transition: transform 0.35s ease;
    align-items: stretch;
  }
  .main-nav.open { transform: translateY(0); }
  .main-nav ul { flex-direction: column; gap: 0; }
  .main-nav ul li { border-bottom: 1px solid var(--light-gray-2); }
  .main-nav ul a { display: block; padding: 14px 4px; }
  .nav-cta { margin-top: 14px; text-align: center; justify-content: center; }
  .nav-toggle { display: flex; }

  .section { padding: 70px 0; }
  .products-grid { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; text-align: center; }
}

@media (max-width: 560px) {
  .solutions-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 30px; }
  .hero-stats { gap: 24px; }
  .keywords-track { gap: 22px; }
}