/* ===== CSS Variables ===== */
:root {
  --primary-green: #2e7d32;
  --primary-green-light: #4caf50;
  --primary-blue: #046BD2;
  --text-dark: #1e293b;
  --text-gray: #64748b;
  --bg-light: #f8faf8;
  --bg-white: #ffffff;
  --border-color: #e2e8f0;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --radius: 12px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--text-dark);
  line-height: 1.6;
  background-color: var(--bg-white);
}

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

ul {
  list-style: none;
}

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

/* ===== Layout ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.section-subtitle {
  text-align: center;
  color: var(--text-gray);
  margin-bottom: 3rem;
}

/* ===== Header ===== */
.header {
  background: var(--bg-white);
  box-shadow: var(--shadow);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo img {
  height: 45px;
  width: auto;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-green);
}

.nav {
  display: flex;
  gap: 2rem;
}

.nav a {
  font-weight: 500;
  color: var(--text-dark);
  padding: 8px 0;
  position: relative;
  transition: color 0.3s;
}

.nav a:hover,
.nav a.active {
  color: var(--primary-green);
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-green);
  transition: width 0.3s;
}

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

/* Mobile Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: 0.3s;
}

/* ===== Hero Section ===== */
.hero {
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
              url('../images/hero-background.jpg') center/cover no-repeat;
  color: white;
  margin-top: 75px;
}

.hero-content {
  max-width: 800px;
  padding: 20px;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.95;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--primary-green-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background: transparent;
  border: 2px solid white;
  color: white;
  margin-left: 10px;
}

.btn-outline:hover {
  background: white;
  color: var(--primary-green);
}

/* ===== Services Section ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.service-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all 0.3s;
  border: 1px solid var(--border-color);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.service-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--primary-green), var(--primary-green-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 2rem;
}

.service-card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
  color: var(--text-dark);
}

.service-card p {
  color: var(--text-gray);
  font-size: 0.95rem;
}

/* ===== Portfolio Section ===== */
.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.portfolio-item {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
}

.portfolio-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.portfolio-item:hover img {
  transform: scale(1.1);
}

.portfolio-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0,0,0,0.8));
  color: white;
  padding: 30px 20px 20px;
  transform: translateY(100%);
  transition: transform 0.3s;
}

.portfolio-item:hover .portfolio-overlay {
  transform: translateY(0);
}

.portfolio-overlay h4 {
  font-size: 1.1rem;
  margin-bottom: 5px;
}

.portfolio-overlay p {
  font-size: 0.9rem;
  opacity: 0.9;
}

/* ===== Promotion Banner ===== */
.promo-banner {
  background: linear-gradient(135deg, var(--primary-green), var(--primary-blue));
  color: white;
  text-align: center;
  padding: 60px 20px;
}

.promo-banner h2 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
}

.promo-banner p {
  font-size: 1.1rem;
  opacity: 0.95;
  margin-bottom: 1.5rem;
}

/* ===== About Page ===== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.about-intro img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.about-text h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--primary-green);
}

.about-text p {
  color: var(--text-gray);
  margin-bottom: 1rem;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 30px;
}

.team-card {
  background: var(--bg-white);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}

.team-card h3 {
  font-size: 1.25rem;
  margin-bottom: 5px;
}

.team-card .role {
  color: var(--primary-green);
  font-weight: 500;
  margin-bottom: 15px;
}

.team-card p {
  color: var(--text-gray);
  font-size: 0.9rem;
}

/* ===== Contact Form ===== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}

.contact-info {
  background: var(--bg-light);
  padding: 40px;
  border-radius: var(--radius);
}

.contact-info h3 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--primary-green);
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  margin-bottom: 20px;
}

.contact-info-item .icon {
  width: 40px;
  height: 40px;
  background: var(--primary-green);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-form {
  background: var(--bg-white);
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form-notice {
  background: linear-gradient(135deg, var(--primary-green), var(--primary-green-light));
  color: white;
  padding: 15px 20px;
  border-radius: 8px;
  margin-bottom: 25px;
  font-weight: 500;
}

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

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-dark);
}

.form-group label .required {
  color: #dc2626;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-green);
  box-shadow: 0 0 0 3px rgba(46, 125, 50, 0.1);
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.btn-submit {
  width: 100%;
  padding: 16px;
  font-size: 1.1rem;
}

/* ===== Footer ===== */
.footer {
  background: var(--text-dark);
  color: white;
  padding: 50px 0 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 30px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 15px;
}

.footer-logo img {
  height: 40px;
}

.footer-logo span {
  font-size: 1.1rem;
  font-weight: 600;
}

.footer-desc {
  color: #94a3b8;
  font-size: 0.95rem;
  margin-bottom: 15px;
}

.footer h4 {
  font-size: 1rem;
  margin-bottom: 15px;
  color: white;
}

.footer ul li {
  margin-bottom: 10px;
}

.footer ul li a {
  color: #94a3b8;
  transition: color 0.3s;
}

.footer ul li a:hover {
  color: var(--primary-green-light);
}

.footer-bottom {
  border-top: 1px solid #334155;
  padding-top: 20px;
  text-align: center;
  color: #94a3b8;
  font-size: 0.9rem;
}

/* ===== Page Header ===== */
.page-header {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),
              url('../images/hero-background.jpg') center/cover no-repeat;
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: white;
  margin-top: 75px;
}

.page-header h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.page-header p {
  font-size: 1.1rem;
  opacity: 0.9;
}

/* ===== Lightbox ===== */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.9);
  z-index: 2000;
  align-items: center;
  justify-content: center;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90%;
  max-height: 90%;
  border-radius: 8px;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  color: white;
  font-size: 2rem;
  cursor: pointer;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 20px;
    gap: 0;
    box-shadow: var(--shadow);
  }

  .nav.active {
    display: flex;
  }

  .nav a {
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
  }

  .menu-toggle {
    display: flex;
  }

  .hero {
    height: auto;
    min-height: 500px;
    padding: 100px 20px;
  }

  .hero h1 {
    font-size: 2rem;
  }

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

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

  .footer-content {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .btn-outline {
    display: block;
    margin: 10px 0 0 0;
  }
}

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

.animate-fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* ===== Utilities ===== */
.text-center {
  text-align: center;
}

.mb-4 {
  margin-bottom: 2rem;
}

.mt-4 {
  margin-top: 2rem;
}