/* ============================================
   NEWCHAE Global Site - Styles
   System: Clinical Ivory × Soft Tech Hybrid
   ============================================ */

/* Pretendard + Inter via CDN */
@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard@v1.3.9/dist/web/variable/pretendardvariable.css');
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ========== Design Tokens ========== */
:root {
  /* Colors - Clinical Ivory × Soft Tech Hybrid */
  --warm-ivory: #F5F4F0;
  --sand-mist: #E9E7E0;
  --ink-black: #1C1C1C;
  --soft-graphite: #6B6B6B;
  --dusty-lilac: #A494C7;

  /* Typography */
  --font-sans: 'Inter', 'Pretendard Variable', -apple-system, sans-serif;

  /* Spacing */
  --container: 1200px;
  --gutter-lg: 120px;
  --gutter-md: 80px;
  --gutter-sm: 48px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink-black);
  background: var(--warm-ivory);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ========== Typography ========== */
h1, h2, h3, h4 {
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.2;
}

.display {
  font-size: clamp(48px, 7vw, 88px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
}

h1 {
  font-size: clamp(36px, 5vw, 56px);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(28px, 3.5vw, 44px);
}

h3 {
  font-size: 22px;
  font-weight: 500;
}

.eyebrow {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dusty-lilac);
  margin-bottom: 20px;
}

.lead {
  font-size: 20px;
  color: var(--soft-graphite);
  line-height: 1.6;
  max-width: 620px;
}

/* ========== Layout ========== */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
}

section {
  padding: var(--gutter-lg) 0;
}

/* ========== Header ========== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 244, 240, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--sand-mist);
}

header .inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: 'Inter', sans-serif;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-black);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 44px;
  align-items: center;
}

nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--soft-graphite);
  transition: color 0.2s ease;
  position: relative;
  padding: 4px 0;
}

nav a:hover {
  color: var(--ink-black);
}

nav a.active {
  color: var(--ink-black);
}

nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--dusty-lilac);
}

.contact-btn {
  background: var(--dusty-lilac);
  color: var(--ink-black) !important;
  padding: 10px 20px;
  border-radius: 2px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.2s ease;
}

.contact-btn:hover {
  transform: translateY(-1px);
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 18px 32px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-radius: 2px;
  transition: all 0.25s ease;
}

.btn-primary {
  background: var(--dusty-lilac);
  color: var(--ink-black);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(164, 148, 199, 0.25);
}

.btn-secondary {
  background: transparent;
  color: var(--ink-black);
  border: 1px solid var(--ink-black);
}

.btn-secondary:hover {
  background: var(--ink-black);
  color: var(--warm-ivory);
}

/* ========== Hero ========== */
.hero {
  padding-top: 100px;
  padding-bottom: 120px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-text .display {
  margin-bottom: 32px;
}

.hero-text .lead {
  margin-bottom: 48px;
}

.hero-ctas {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
  aspect-ratio: 3 / 4;
  background: var(--sand-mist);
  overflow: hidden;
  border-radius: 2px;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* ========== Trust Bar ========== */
.trust-bar {
  background: var(--sand-mist);
  padding: 56px 0;
  border-top: 1px solid rgba(28, 28, 28, 0.04);
  border-bottom: 1px solid rgba(28, 28, 28, 0.04);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}

.trust-item .label {
  font-size: 24px;
  font-weight: 600;
  color: var(--ink-black);
  letter-spacing: 0.02em;
  margin-bottom: 8px;
}

.trust-item .caption {
  font-size: 12px;
  color: var(--soft-graphite);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ========== Two-col ========== */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.two-col.reverse {
  direction: rtl;
}
.two-col.reverse > * {
  direction: ltr;
}

.product-shot {
  aspect-ratio: 1;
  background: var(--sand-mist);
  overflow: hidden;
  border-radius: 2px;
}

.product-shot img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ========== Mode Cards ========== */
.mode-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.mode-card {
  background: var(--sand-mist);
  padding: 48px 36px;
  border-radius: 2px;
  transition: transform 0.3s ease;
}

.mode-card:hover {
  transform: translateY(-4px);
}

.mode-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--dusty-lilac);
  padding: 5px 10px;
  border: 1px solid var(--dusty-lilac);
  border-radius: 2px;
  margin-bottom: 32px;
}

.mode-card h3 {
  font-size: 26px;
  font-weight: 600;
  margin-bottom: 4px;
}

.mode-card .mode-sub {
  font-size: 13px;
  color: var(--soft-graphite);
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.mode-card p {
  font-size: 15px;
  color: var(--soft-graphite);
  line-height: 1.7;
}

/* ========== Clinical Numbers ========== */
.clinical {
  padding: var(--gutter-lg) 0;
}

.clinical-header {
  text-align: center;
  margin-bottom: 80px;
}

.clinical-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  max-width: 900px;
  margin: 0 auto;
}

.clinical-item {
  text-align: center;
}

.clinical-number {
  font-family: 'Inter', sans-serif;
  font-size: clamp(88px, 12vw, 140px);
  font-weight: 700;
  line-height: 1;
  color: var(--dusty-lilac);
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}

.clinical-label {
  font-size: 18px;
  font-weight: 500;
  color: var(--ink-black);
  margin-bottom: 6px;
}

.clinical-sub {
  font-size: 13px;
  color: var(--soft-graphite);
}

.clinical-source {
  text-align: center;
  margin-top: 64px;
  font-size: 12px;
  color: var(--soft-graphite);
  letter-spacing: 0.03em;
}

/* ========== Section Header ========== */
.section-header {
  margin-bottom: 72px;
  max-width: 720px;
}

.section-header.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-header h2 {
  margin-bottom: 24px;
}

.section-header p {
  font-size: 18px;
  color: var(--soft-graphite);
  line-height: 1.7;
}

/* ========== Spec Table ========== */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 60px;
}

.spec-table tr {
  border-bottom: 1px solid var(--sand-mist);
}

.spec-table tr:first-child {
  border-top: 1px solid var(--sand-mist);
}

.spec-table td {
  padding: 20px 0;
  font-size: 15px;
}

.spec-table td:first-child {
  font-weight: 500;
  color: var(--soft-graphite);
  width: 40%;
}

.spec-table td:last-child {
  color: var(--ink-black);
}

/* ========== Patents ========== */
.patents-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 60px;
}

.patent-card {
  background: var(--sand-mist);
  padding: 56px 48px;
  border-radius: 2px;
}

.patent-number {
  font-family: 'Inter', sans-serif;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink-black);
  margin-bottom: 32px;
  letter-spacing: -0.01em;
}

.patent-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 16px;
}

.patent-card .office {
  font-size: 13px;
  color: var(--soft-graphite);
}

/* ========== Stats ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  margin-top: 60px;
}

.stat {
  text-align: center;
  padding: 40px 20px;
}

.stat-number {
  font-family: 'Inter', sans-serif;
  font-size: 64px;
  font-weight: 700;
  line-height: 1;
  color: var(--ink-black);
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}

.stat.highlight .stat-number {
  color: var(--dusty-lilac);
}

.stat-label {
  font-size: 13px;
  color: var(--soft-graphite);
  letter-spacing: 0.03em;
}

/* ========== Cert Grid ========== */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 60px;
}

.cert-item {
  border: 1px solid var(--sand-mist);
  padding: 36px 28px;
  text-align: center;
  transition: border-color 0.2s ease;
}

.cert-item:hover {
  border-color: var(--ink-black);
}

.cert-item .cert-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-black);
  margin-bottom: 6px;
}

.cert-item .cert-desc {
  font-size: 12px;
  color: var(--soft-graphite);
}

/* ========== Partnership Cards ========== */
.partner-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.partner-card {
  background: var(--sand-mist);
  padding: 48px 36px;
  border-radius: 2px;
  display: flex;
  flex-direction: column;
}

.partner-card h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 24px;
}

.partner-card p {
  font-size: 15px;
  color: var(--soft-graphite);
  line-height: 1.7;
  margin-bottom: 32px;
  flex-grow: 1;
}

.partner-moq {
  font-size: 15px;
  font-weight: 600;
  color: var(--dusty-lilac);
  padding-top: 24px;
  border-top: 1px solid rgba(28, 28, 28, 0.08);
}

.partner-note {
  font-size: 12px;
  color: var(--soft-graphite);
  margin-top: 10px;
  line-height: 1.5;
}

/* ========== Process ========== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-top: 60px;
}

.process-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.process-num {
  font-family: 'Inter', sans-serif;
  font-size: 14px;
  font-weight: 700;
  color: var(--dusty-lilac);
  letter-spacing: 0.05em;
  min-width: 24px;
}

.process-step h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 14px;
  color: var(--soft-graphite);
  line-height: 1.6;
}

/* ========== Contact Form ========== */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  margin-top: 60px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field label {
  font-size: 12px;
  font-weight: 500;
  color: var(--soft-graphite);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.form-field label .req {
  color: var(--dusty-lilac);
}

.form-field input,
.form-field select,
.form-field textarea {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--sand-mist);
  padding: 12px 0;
  font-family: inherit;
  font-size: 16px;
  color: var(--ink-black);
  transition: border-color 0.2s ease;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-bottom-color: var(--dusty-lilac);
}

.form-field textarea {
  resize: vertical;
  min-height: 100px;
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-top: 4px;
}

.radio-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--ink-black);
  cursor: pointer;
}

.radio-item input[type="radio"] {
  accent-color: var(--dusty-lilac);
}

.contact-info {
  padding-top: 40px;
}

.contact-info h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 32px;
}

.contact-info-item {
  margin-bottom: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--sand-mist);
}

.contact-info-item:last-child {
  border-bottom: none;
}

.contact-info-item .label {
  font-size: 11px;
  font-weight: 500;
  color: var(--soft-graphite);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.contact-info-item .value {
  font-size: 16px;
  font-weight: 500;
  color: var(--ink-black);
}

/* ========== Footer ========== */
footer {
  background: var(--sand-mist);
  padding: 80px 0 48px;
  margin-top: 120px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 80px;
  margin-bottom: 60px;
}

.footer-brand .logo {
  display: block;
  margin-bottom: 24px;
}

.footer-address {
  font-size: 14px;
  color: var(--soft-graphite);
  line-height: 1.8;
  max-width: 320px;
}

.footer-contact h4 {
  font-size: 11px;
  font-weight: 600;
  color: var(--soft-graphite);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.footer-contact p {
  font-size: 14px;
  color: var(--ink-black);
  margin-bottom: 8px;
}

.footer-bottom {
  padding-top: 40px;
  border-top: 1px solid rgba(28, 28, 28, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--soft-graphite);
}

.footer-certs {
  display: flex;
  gap: 16px;
  letter-spacing: 0.05em;
}

/* ========== Animations ========== */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-up {
  animation: fadeUp 0.8s ease-out both;
}

.fade-up.delay-1 { animation-delay: 0.15s; }
.fade-up.delay-2 { animation-delay: 0.3s; }
.fade-up.delay-3 { animation-delay: 0.45s; }

/* ========== Responsive ========== */
@media (max-width: 900px) {
  :root {
    --gutter-lg: 80px;
    --gutter-md: 56px;
  }

  .container {
    padding: 0 24px;
  }

  header .inner {
    padding: 0 24px;
    height: 64px;
  }

  nav ul {
    gap: 20px;
  }

  nav a:not(.contact-btn) {
    display: none;
  }

  .hero-grid,
  .two-col,
  .clinical-grid,
  .mode-grid,
  .patents-grid,
  .partner-grid,
  .cert-grid,
  .stats-grid,
  .process-grid,
  .contact-wrap,
  .trust-grid,
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .two-col.reverse {
    direction: ltr;
  }

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

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

  .hero {
    padding-top: 60px;
    padding-bottom: 80px;
  }

  .hero-ctas {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    justify-content: center;
  }
}