/* ============================================
   BrandMate AI - Modern Gradient Forward Design
   Design Philosophy: Warm, accessible, innovative
   Primary Color: Indigo (#4F46E5)
   Accent Color: Warm Orange (#F97316)
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Pretendard:wght@400;500;600;700;800&display=swap');

:root {
  /* Colors */
  --primary: #4F46E5;
  --primary-dark: #4338CA;
  --primary-light: #818CF8;
  --accent: #F97316;
  --accent-light: #FB923C;
  --background: #FFFFFF;
  --surface: #F9FAFB;
  --surface-alt: #F3F4F6;
  --text-primary: #1F2937;
  --text-secondary: #6B7280;
  --text-tertiary: #9CA3AF;
  --border: #E5E7EB;
  --border-light: #F3F4F6;
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.23, 1, 0.32, 1);
  --transition-base: 200ms cubic-bezier(0.23, 1, 0.32, 1);
  --transition-slow: 300ms cubic-bezier(0.23, 1, 0.32, 1);
}

/* ============================================
   Reset & Base Styles
   ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
}

h2 {
  font-size: 2rem;
  font-weight: 700;
}

h3 {
  font-size: 1.5rem;
  font-weight: 700;
}

p {
  color: var(--text-secondary);
}

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

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

/* ============================================
   Header & Navigation
   ============================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-xl);
  height: 64px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

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

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

.nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.user-area {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  position: relative;
  overflow: hidden;
  padding: 60px var(--spacing-xl) 80px;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(249, 115, 22, 0.05) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('/manus-storage/hero-background_270d3bfb.png');
  background-size: cover;
  background-position: center;
  opacity: 0.3;
  z-index: 0;
}

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--border-light);
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  animation: fadeInDown 0.6s ease-out;
}

.hero h1 {
  max-width: 600px;
  margin-bottom: var(--spacing-lg);
  line-height: 1.3;
  animation: fadeInDown 0.6s ease-out 0.1s both;
}

.hero h1 br {
  display: none;
}

.hero p {
  max-width: 600px;
  font-size: 1.125rem;
  margin-bottom: var(--spacing-xl);
  animation: fadeInDown 0.6s ease-out 0.2s both;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  animation: fadeInDown 0.6s ease-out 0.3s both;
}

.demo-switch {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-lg);
  background-color: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.875rem;
}

.demo-switch span {
  font-weight: 600;
  color: var(--text-secondary);
}

.demo-switch button {
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.demo-switch button:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.demo-switch button.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: inherit;
}

.btn:active {
  transform: scale(0.97);
}

.btn.primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn.primary:hover {
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
  transform: translateY(-2px);
}

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

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

.btn.full {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.small-link {
  background: none;
  border: none;
  padding: 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition-fast);
}

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

/* ============================================
   Sections
   ============================================ */

.section {
  padding: 80px var(--spacing-xl);
  max-width: 1280px;
  margin: 0 auto;
}

.section.soft-bg {
  background-color: var(--surface);
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.eyebrow {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: var(--spacing-md);
}

.section-title h2 {
  margin-bottom: var(--spacing-md);
}

.section-title p {
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.125rem;
}

/* ============================================
   Features Grid
   ============================================ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.feature-card {
  padding: var(--spacing-xl);
  background-color: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  animation: fadeInUp 0.6s ease-out;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(79, 70, 229, 0.15);
  border-color: var(--primary-light);
}

.feature-card .icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(249, 115, 22, 0.1) 100%);
  border-radius: var(--radius-lg);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-lg);
}

.feature-card h3 {
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.feature-card p {
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ============================================
   Generator Section
   ============================================ */

.state-panel {
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background-color: var(--background);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  display: none;
}

.state-panel.visible {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

.state-panel h3 {
  margin-bottom: var(--spacing-md);
  color: var(--primary);
}

.state-panel p {
  font-size: 0.95rem;
  line-height: 1.6;
}

.generator-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

@media (max-width: 1024px) {
  .generator-layout {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Form Styles
   ============================================ */

.form-box {
  padding: var(--spacing-xl);
  background-color: var(--surface-alt);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
}

.form-row {
  display: grid;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

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

@media (max-width: 640px) {
  .form-row.two-columns {
    grid-template-columns: 1fr;
  }
}

.form-box label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.form-box input,
.form-box textarea,
.form-box select {
  width: 100%;
  padding: 12px var(--spacing-md);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 1rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  background-color: var(--background);
}

.form-box input:focus,
.form-box textarea:focus,
.form-box select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.form-helper {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  margin-top: var(--spacing-lg);
  text-align: center;
}

/* ============================================
   Result Box
   ============================================ */

.result-box {
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.05) 0%, rgba(249, 115, 22, 0.05) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  min-height: 400px;
  display: flex;
  flex-direction: column;
}

.result-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border);
}

.result-top .eyebrow {
  margin-bottom: var(--spacing-sm);
}

.result-top h2 {
  margin: 0;
}

#resultArea {
  flex: 1;
  overflow-y: auto;
  padding-right: var(--spacing-md);
}

#resultArea::-webkit-scrollbar {
  width: 6px;
}

#resultArea::-webkit-scrollbar-track {
  background: transparent;
}

#resultArea::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

#resultArea::-webkit-scrollbar-thumb:hover {
  background: var(--text-tertiary);
}

.empty-result {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  gap: var(--spacing-md);
}

.empty-result strong {
  color: var(--text-primary);
  font-size: 1.125rem;
}

.empty-result span {
  color: var(--text-tertiary);
  font-size: 0.95rem;
}

.result-item {
  background-color: var(--background);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  margin-bottom: var(--spacing-md);
  animation: fadeIn 0.3s ease-out;
}

.result-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.result-item-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
}

.result-item-copy {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-tertiary);
  transition: color var(--transition-fast);
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
}

.result-item-copy:hover {
  color: var(--primary);
}

.result-item-copy.copied {
  color: var(--success);
}

.result-item-content {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-primary);
  white-space: pre-wrap;
  word-break: break-word;
}

.result-item.blurred .result-item-content {
  filter: blur(4px);
  user-select: none;
}

/* ============================================
   Pricing Section
   ============================================ */

.single-pricing {
  display: flex;
  justify-content: center;
  margin-top: var(--spacing-2xl);
}

.price-card {
  width: 100%;
  max-width: 400px;
  padding: var(--spacing-xl);
  background-color: var(--background);
  border: 2px solid var(--border);
  border-radius: var(--radius-xl);
  text-align: center;
  transition: all var(--transition-base);
}

.price-card.basic-card {
  border-color: var(--primary);
  box-shadow: 0 20px 40px rgba(79, 70, 229, 0.15);
}

.price-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 30px 60px rgba(79, 70, 229, 0.2);
}

.plan-badge {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.price-card h3 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

.price-card strong {
  display: block;
  font-size: 2.5rem;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

.price-card strong::after {
  content: '/월';
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  margin-left: var(--spacing-sm);
}

.price-card p {
  font-size: 0.95rem;
  line-height: 1.8;
  margin: var(--spacing-xl) 0;
  text-align: left;
}

.price-card p br {
  content: '';
  display: block;
  height: var(--spacing-md);
}

.price-card .btn {
  margin-top: var(--spacing-lg);
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background-color: var(--text-primary);
  color: white;
  padding: var(--spacing-2xl) var(--spacing-xl);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer strong {
  font-size: 1.125rem;
}

.footer span {
  font-size: 0.95rem;
  opacity: 0.8;
}

/* ============================================
   Toast Notifications
   ============================================ */

.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  padding: var(--spacing-lg) var(--spacing-xl);
  background-color: var(--text-primary);
  color: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: none;
  z-index: 1000;
  animation: slideInUp 0.3s ease-out;
}

.toast.show {
  display: block;
}

.toast.success {
  background-color: var(--success);
}

.toast.error {
  background-color: var(--error);
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .site-header {
    padding: var(--spacing-md);
  }

  .nav {
    gap: var(--spacing-lg);
  }

  .hero {
    padding: 40px var(--spacing-lg) 60px;
  }

  .hero h1 br {
    display: block;
  }

  .hero p br {
    display: block;
  }

  .section {
    padding: 60px var(--spacing-lg);
  }

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

  .generator-layout {
    gap: var(--spacing-lg);
  }

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

  .demo-switch {
    flex-direction: column;
    align-items: flex-start;
  }

  .demo-switch button {
    flex: 1;
    width: 100%;
  }
}

@media (max-width: 480px) {
  :root {
    font-size: 14px;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .site-header {
    height: auto;
    flex-wrap: wrap;
    gap: var(--spacing-md);
  }

  .nav {
    width: 100%;
    gap: var(--spacing-md);
    font-size: 0.75rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .section {
    padding: 40px var(--spacing-md);
  }

  .generator-layout {
    grid-template-columns: 1fr;
  }

  .btn {
    padding: 10px 16px;
    font-size: 0.875rem;
  }
}

/* ============================================
   Accessibility
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Skip to main content link */
.skip-to-main {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--primary);
  color: white;
  padding: 8px;
  text-decoration: none;
  z-index: 100;
}

.skip-to-main:focus {
  top: 0;
}