@import url('variables.css');

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

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

/* Section */
.section {
  padding: var(--space-3xl) 0;
}

.section-title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--space-md);
  text-align: center;
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-light);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-2xl);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(240, 248, 238, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--bg-dark);
  transition: var(--transition);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--container-padding);
  max-width: var(--container-max);
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--primary);
}

.logo svg {
  width: 32px;
  height: 32px;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-light);
  transition: var(--transition-fast);
}

.nav-link:hover {
  color: var(--primary);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.lang-switch {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-light);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.lang-switch:hover {
  background: var(--bg-dark);
  color: var(--primary);
}

/* Mobile menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--space-sm);
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  background: var(--text);
  transition: var(--transition-fast);
}

/* Mobile menu active states */
.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

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

  .nav.active {
    display: flex;
  }

  .nav-link {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius);
  }

  .nav-link:hover {
    background: var(--bg);
  }

  .menu-toggle {
    display: flex;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius);
  transition: var(--transition-fast);
}

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

.btn-primary:hover {
  background: var(--secondary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

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

.btn-secondary:hover {
  background: var(--primary-dark);
}

.btn-outline {
  border: 2px solid var(--primary);
  color: var(--primary);
}

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

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--text-base);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 80px;
  background: linear-gradient(135deg, var(--bg) 0%, var(--bg-dark) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 150%;
  background: radial-gradient(circle, rgba(117, 186, 0, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-text {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  background: var(--secondary);
  color: var(--primary);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--primary);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-lg);
}

.hero-title span {
  color: var(--secondary);
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--text-light);
  margin-bottom: var(--space-xl);
  max-width: 500px;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
}

/* Approach Section */
.approach {
  background: var(--primary);
  color: white;
}

.approach .section-title {
  color: white;
}

.approach .section-subtitle {
  color: rgba(255, 255, 255, 0.8);
}

.approach-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: var(--space-xl);
}

.approach-card {
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition);
}

.approach-card:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-2px);
}

.approach-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-md);
  background: rgba(117, 186, 0, 0.2);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-xl);
  color: var(--secondary);
}

.approach-card h3 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-lg);
  line-height: 1.4;
}

.approach-problem,
.approach-solution {
  margin-bottom: var(--space-md);
}

.approach-solution {
  margin-bottom: 0;
}

.approach-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
}

.approach-problem .approach-label {
  background: rgba(255, 107, 53, 0.3);
  color: #ffb399;
}

.approach-solution .approach-label {
  background: rgba(117, 186, 0, 0.3);
  color: #b8e67a;
}

.approach-problem p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.6;
}

.approach-solution p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.6;
}

/* Services Section */
.services {
  background: #f7f5f3;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.service-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid transparent;
}

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

.service-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  font-size: var(--text-xl);
  color: white;
}

.service-card h3 {
  font-size: var(--text-xl);
  color: var(--primary);
  margin-bottom: var(--space-sm);
}

.service-card p {
  font-size: var(--text-sm);
  color: var(--text-light);
  margin-bottom: var(--space-md);
}

.service-features {
  list-style: none;
}

.service-features li {
  font-size: var(--text-sm);
  color: var(--text);
  padding: var(--space-xs) 0;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.service-features li::before {
  content: '→';
  color: var(--secondary);
  font-weight: bold;
}

/* Metrics Dashboard Section */
.metrics {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.metrics::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.metrics .section-title {
  color: white;
}

.metrics .section-subtitle {
  color: rgba(255, 255, 255, 0.8);
}

.metrics-content {
  position: relative;
  z-index: 1;
}

.dashboard {
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  max-width: 800px;
  margin: 0 auto;
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.dashboard-title {
  font-size: var(--text-lg);
  font-weight: 600;
}

.live-badge {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: var(--success);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
}

.live-dot {
  width: 8px;
  height: 8px;
  background: white;
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.metrics-grid {
  display: grid;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.metric-row {
  display: grid;
  grid-template-columns: 100px 1fr 80px;
  align-items: center;
  gap: var(--space-md);
}

.metric-label {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.8);
}

.metric-bar {
  height: 12px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.metric-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 1s ease;
}

.metric-fill.normal {
  background: linear-gradient(90deg, var(--secondary) 0%, var(--success) 100%);
}

.metric-fill.warning {
  background: linear-gradient(90deg, var(--warning) 0%, var(--accent) 100%);
}

.metric-fill.danger {
  background: linear-gradient(90deg, var(--error) 0%, #FF0000 100%);
}

.metric-status {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-sm);
  font-family: var(--font-mono);
}

.status-icon {
  font-size: var(--text-base);
}

.status-icon.ok { color: var(--success); }
.status-icon.warn { color: var(--warning); }
.status-icon.error { color: var(--error); }

.events {
  background: rgba(0, 0, 0, 0.2);
  border-radius: var(--radius);
  padding: var(--space-md);
}

.events-title {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-sm);
}

.event-list {
  list-style: none;
}

.event-item {
  font-size: var(--text-sm);
  padding: var(--space-xs) 0;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: rgba(255, 255, 255, 0.9);
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateX(-10px); }
  to { opacity: 1; transform: translateX(0); }
}

.event-icon {
  font-size: var(--text-base);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  background: white;
  border-radius: var(--radius);
  padding: var(--space-md) var(--space-lg);
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  transform: translateX(120%);
  transition: var(--transition);
  z-index: 1001;
  border-left: 4px solid var(--warning);
}

.toast.show {
  transform: translateX(0);
}

.toast-icon {
  font-size: var(--text-xl);
}

.toast-content h4 {
  font-size: var(--text-sm);
  color: var(--primary);
  margin-bottom: var(--space-xs);
}

.toast-content p {
  font-size: var(--text-xs);
  color: var(--text-light);
}

/* Process Section */
.process {
  background: white;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  position: relative;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--bg-dark);
  z-index: 0;
}

.timeline-item {
  position: relative;
  z-index: 1;
  text-align: center;
}

.timeline-number {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: white;
  border: 4px solid white;
  box-shadow: var(--shadow);
}

.timeline-item h3 {
  font-size: var(--text-lg);
  color: var(--primary);
  margin-bottom: var(--space-sm);
}

.timeline-tasks {
  list-style: none;
  font-size: var(--text-sm);
  color: var(--text-light);
}

.timeline-tasks li {
  padding: var(--space-xs) 0;
}

/* Tech Stack Section */
.tech {
  background: var(--bg);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.tech-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.tech-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.tech-logo {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-3xl);
  color: var(--primary);
}

.tech-card h4 {
  font-size: var(--text-base);
  color: var(--primary);
  margin-bottom: var(--space-xs);
}

.tech-card p {
  font-size: var(--text-sm);
  color: var(--text-light);
}

/* Contact Section */
.contact {
  background: var(--bg);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

/* 왼쪽: 프로젝트 정보 */
.project-info h3 {
  font-size: var(--text-xl);
  color: var(--primary);
  margin-bottom: var(--space-sm);
}

.project-info-desc {
  font-size: var(--text-sm);
  color: var(--text-light);
  margin-bottom: var(--space-lg);
}

.project-fields {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.field-label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text);
}

.option-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.option-btn {
  padding: 6px 12px;
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--text-light);
  background: white;
  border: 1px solid var(--bg-dark);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-fast);
}

.option-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.option-btn.selected {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.option-group.multi .option-btn.selected {
  background: var(--secondary);
  border-color: var(--secondary);
}

/* 오른쪽: 기본 폼 */
.contact-form {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text);
  margin-bottom: var(--space-xs);
}

.form-label .optional {
  font-weight: 400;
  color: var(--text-light);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--text-base);
  border: 1px solid var(--bg-dark);
  border-radius: var(--radius);
  background: white;
  transition: var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

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

.form-submit {
  width: 100%;
  margin-top: var(--space-md);
}

/* Footer */
.footer {
  background: var(--primary-dark);
  color: white;
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
  max-width: 400px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.footer-brand p {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  line-height: var(--leading-relaxed);
}

.footer-links h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links ul {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-links a {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--secondary);
}

.footer-social {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-lg);
  transition: var(--transition-fast);
}

.footer-social a:hover {
  background: var(--secondary);
  color: white;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom-links {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.footer-bottom-links a {
  color: rgba(255, 255, 255, 0.5);
  transition: var(--transition-fast);
}

.footer-bottom-links a:hover {
  color: var(--secondary);
}

/* Scroll animations */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Responsive */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-text {
    order: 1;
  }

  .hero-visual {
    order: 0;
    margin-bottom: var(--space-xl);
  }

  .hero-description {
    margin: 0 auto var(--space-xl);
  }

  .hero-actions {
    justify-content: center;
  }

  .approach-grid,
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .timeline {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }

  .timeline::before {
    display: none;
  }

  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .project-info {
    order: 1;
  }

  .contact-form {
    order: 2;
  }

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

@media (max-width: 768px) {
  :root {
    --text-5xl: 2.25rem;
    --text-4xl: 1.875rem;
    --text-3xl: 1.5rem;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 var(--space-3xl);
  }

  .approach-grid,
  .services-grid,
  .timeline,
  .tech-grid {
    grid-template-columns: 1fr;
  }

  .metric-row {
    grid-template-columns: 80px 1fr 60px;
  }

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

  .footer-brand {
    max-width: none;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

/* Utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.hidden { display: none; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}