/* ============================================
   BIOCESS - Spring Subun Ampoule
   Main Stylesheet
   ============================================ */

/* --- Google Fonts & Variables --- */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&family=Montserrat:wght@300;400;500;600;700&family=Noto+Sans+KR:wght@300;400;500&display=swap');

:root {
  --color-primary: #7FD4AF;
  --color-primary-dark: #2D5F4E;
  --color-primary-light: #B5E8D5;
  --color-accent: #FFB6A3;
  --color-bg: #F8F9F8;
  --color-bg-alt: #F0F5F2;
  --color-text: #2C2C2C;
  --color-text-light: #6B7280;
  --color-white: #FFFFFF;
  --color-green-bottle: #1a5c3a;
  --color-border: #E5EDE9;
  --font-serif: 'Cormorant Garamond', Georgia, serif;
  --font-sans: 'Montserrat', sans-serif;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --radius-full: 9999px;
  --shadow-sm: 0 2px 8px rgba(45, 95, 78, 0.08);
  --shadow-md: 0 8px 32px rgba(45, 95, 78, 0.12);
  --shadow-lg: 0 20px 60px rgba(45, 95, 78, 0.16);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1280px;
}

/* --- 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);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

ul { list-style: none; }

/* --- Typography --- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); }
h3 { font-size: clamp(1.5rem, 2.5vw, 2.2rem); }
h4 { font-size: clamp(1.2rem, 2vw, 1.6rem); }

p { font-size: 1rem; color: var(--color-text-light); line-height: 1.8; }

.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--color-primary-dark);
  margin-bottom: 1rem;
}

/* --- Layout --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.section { padding: 7rem 0; }
.section-sm { padding: 4rem 0; }

.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* --- Header / Navigation --- */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.2rem 0;
  transition: var(--transition);
  background: transparent;
}

#site-header.scrolled {
  background: rgba(248, 249, 248, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  padding: 0.8rem 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo-text {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  letter-spacing: 0.05em;
}

.nav-logo-sub {
  font-family: var(--font-sans);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin-top: -2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-links a {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text);
  position: relative;
  padding-bottom: 3px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-primary-dark);
  transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

#site-header.light .nav-links a,
#site-header.light .nav-logo-text { color: var(--color-white); }
#site-header.light .nav-logo-sub { color: rgba(255,255,255,0.7); }
#site-header.light.scrolled .nav-links a,
#site-header.light.scrolled .nav-logo-text { color: var(--color-text); }
#site-header.light.scrolled .nav-logo-sub { color: var(--color-text-light); }

.btn-nav {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  background: var(--color-primary-dark);
  color: var(--color-white) !important;
  transition: var(--transition);
}

.btn-nav:hover { background: var(--color-primary); transform: translateY(-1px); }
.btn-nav::after { display: none !important; }

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.nav-hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-text);
  transition: var(--transition);
}

#site-header.light .nav-hamburger span { background: var(--color-white); }
#site-header.light.scrolled .nav-hamburger span { background: var(--color-text); }

.nav-hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile Nav */
.nav-mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-white);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  opacity: 0;
  transform: translateY(-20px);
  transition: var(--transition);
}

.nav-mobile.open {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

.nav-mobile a {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 400;
  color: var(--color-text);
}

.nav-mobile a:hover { color: var(--color-primary-dark); }

.nav-mobile-close {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  font-size: 2rem;
  cursor: pointer;
  color: var(--color-text);
  background: none;
  border: none;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 1rem 2.2rem;
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--color-primary-dark);
  color: var(--color-white);
}

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

.btn-outline {
  background: transparent;
  color: var(--color-primary-dark);
  border: 1.5px solid var(--color-primary-dark);
}

.btn-outline:hover {
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-primary-dark);
}

.btn-white:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
}

/* --- Cards --- */
.card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
}

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

/* --- Badge / Trust badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-full);
  background: rgba(127, 212, 175, 0.15);
  color: var(--color-primary-dark);
  border: 1px solid rgba(127, 212, 175, 0.4);
}

.badge-white {
  background: rgba(255, 255, 255, 0.2);
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.4);
}

/* --- Section titles --- */
.section-title {
  margin-bottom: 1.5rem;
}

.section-title-center {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 1.5rem;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-light);
  max-width: 560px;
}

.section-desc-center {
  text-align: center;
  margin: 0 auto;
}

/* --- Divider --- */
.divider {
  width: 48px;
  height: 2px;
  background: var(--color-primary);
  margin: 1.5rem 0;
}

.divider-center {
  margin: 1.5rem auto;
}

/* --- Forms --- */
.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.85rem 1.1rem;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-text);
  background: var(--color-white);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(127, 212, 175, 0.2);
}

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

/* --- Scroll animations --- */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in {
  opacity: 0;
  transition: opacity 0.7s ease;
}

.fade-in.visible { opacity: 1; }

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* --- Footer --- */
#site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 5rem 0 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--color-white);
  margin-bottom: 0.3rem;
}

.footer-brand-sub {
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 1.2rem;
}

.footer-desc {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.footer-social {
  display: flex;
  gap: 0.8rem;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 0.85rem;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--color-primary);
  transform: translateY(-2px);
}

.footer-col-title {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 1.2rem;
}

.footer-links li { margin-bottom: 0.6rem; }
.footer-links a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
}
.footer-links a:hover { color: var(--color-primary-light); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-copyright {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.4);
}

/* --- Page hero (for inner pages) --- */
.page-hero {
  padding: 10rem 0 5rem;
  background: linear-gradient(135deg, #f0f8f4 0%, #e8f5ef 100%);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(127,212,175,0.15) 0%, transparent 70%);
  pointer-events: none;
}

/* --- Utility classes --- */
.text-center { text-align: center; }
.text-green { color: var(--color-primary-dark); }
.text-mint { color: var(--color-primary); }
.bg-green { background: var(--color-primary-dark); }
.bg-mint { background: var(--color-primary); }
.bg-light { background: var(--color-bg-alt); }
.bg-white { background: var(--color-white); }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mt-6 { margin-top: 3rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 2rem; }

/* --- Lightbox overlay --- */
.lightbox-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.lightbox-overlay.active { display: flex; }

.lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.lightbox-close {
  position: absolute;
  top: 1.5rem;
  right: 2rem;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
}

/* --- Toast notification --- */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--color-primary-dark);
  color: white;
  padding: 1rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  z-index: 9998;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.4s ease;
}

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

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

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 5rem 0; }
  .container { padding: 0 1.2rem; }

  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  .grid-2 { grid-template-columns: 1fr; gap: 2.5rem; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; gap: 1rem; }

  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.8rem; }
}