/* site.css - Unified Premium Design System */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@300;400;500;700&family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

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

:root {
  /* Color Palette - Modern Premium Emerald & Slate */
  --primary: #10b981;
  --primary-hover: #059669;
  --primary-light: #ecfdf5;
  --primary-light-hover: #d1fae5;
  --accent: #f59e0b; /* Amber */
  --accent-light: #fef3c7;
  --success: #10b981;
  --success-light: #ecfdf5;
  --warning: #f59e0b;
  --error: #ef4444;
  --error-light: #fee2e2;
  
  --bg: #f8fafc; /* Slate 50 */
  --surface: #ffffff;
  --surface-alt: #f1f5f9; /* Slate 100 */
  --border: #e2e8f0; /* Slate 200 */
  --border-hover: #cbd5e1; /* Slate 300 */
  
  --text-main: #0f172a; /* Slate 900 */
  --text-muted: #475569; /* Slate 600 */
  --text-light: #94a3b8; /* Slate 400 */
  
  /* Layout constraints */
  --max-width: 1480px;
  --max-width-doc: 800px;
  
  /* Borders and Border Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.04), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 10px 10px -5px rgba(15, 23, 42, 0.03);
  
  /* Transitions */
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  background-color: var(--bg);
  color: var(--text-main);
  font-family: 'Plus Jakarta Sans', 'Noto Sans KR', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Links */
a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--primary-hover);
}

/* Base Layout Container */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Sticky Header with Glassmorphism */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 32px;
}

.logo-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.025em;
  text-decoration: none;
}

.logo-badge {
  background: var(--primary-light);
  color: var(--primary-hover);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 20px;
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.logo-sub {
  font-size: 12px;
  color: var(--text-muted);
}

/* Navigation Links */
nav.site-nav {
  display: flex;
  gap: 6px;
  background: var(--surface-alt);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

nav.site-nav a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}

nav.site-nav a:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.5);
}

nav.site-nav a[aria-current="page"] {
  background: var(--surface);
  color: var(--primary-hover);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

/* Main Content Wrapper */
main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 32px 32px 48px;
}

/* Intro Section */
.intro {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  margin-bottom: 24px;
}

.intro-text h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 32px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.headline-icon {
  flex: 0 0 auto;
  font-size: 30px;
  line-height: 1;
}

.intro-text .lead {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 4px;
}

.intro-text p:not(.lead) {
  font-size: 14px;
  color: var(--text-light);
}

.trust-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

.trust-badge::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--primary);
  border-radius: 50%;
}

/* Cards & Layout Modules */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-lg);
}

/* Settings Toolbar */
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  padding: 18px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.toolbar label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}

.toolbar label:hover {
  border-color: var(--border-hover);
  background: var(--surface-alt);
}

.toolbar input[type="number"] {
  width: 58px;
  padding: 4px 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  text-align: center;
  outline: none;
  background: var(--surface);
  color: var(--text-main);
  transition: var(--transition);
}

.toolbar input[type="number"]:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.15);
}

.toolbar input[type="checkbox"] {
  accent-color: var(--primary);
  width: 14px;
  height: 14px;
  cursor: pointer;
}

/* Styled Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 40px;
  padding: 8px 18px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text-muted);
}

.btn-secondary:hover {
  background: var(--bg);
  border-color: var(--border-hover);
  color: var(--text-main);
}

/* Status Banner */
.status {
  padding: 14px 24px;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.status.success {
  background-color: var(--primary-light);
  color: var(--primary-hover);
  border-bottom-color: rgba(16, 185, 129, 0.2);
}

.status.warn {
  background-color: var(--error-light);
  color: var(--error);
  border-bottom-color: rgba(239, 68, 68, 0.2);
}

/* Workspace Grid Area */
.workspace {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  background: var(--border);
  gap: 1px; /* Divider effect via background color */
}

.column {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  min-width: 0;
}

.column-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 56px;
  padding: 0 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.column h2 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.column h2::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--border-hover);
}

.column:nth-child(1) h2::before { background-color: #3b82f6; } /* Blue */
.column:nth-child(2) h2::before { background-color: var(--primary); } /* Emerald */
.column:nth-child(3) h2::before { background-color: var(--accent); } /* Amber */

.actions {
  display: flex;
  gap: 6px;
}

.actions .btn {
  min-height: 32px;
  padding: 4px 10px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

/* Text Editors & Preview Boxes */
textarea {
  width: 100%;
  height: 640px;
  min-height: 640px;
  flex: 1;
  resize: vertical;
  border: 0;
  padding: 18px;
  background: var(--surface);
  color: #1e293b;
  font-family: 'Fira Code', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.6;
  outline: none;
  transition: var(--transition);
}

textarea:focus {
  background: #fafcfb;
}

.preview-box {
  height: 640px;
  min-height: 640px;
  flex: 1;
  background: var(--surface-alt);
  overflow: hidden;
}

.preview-box iframe {
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--surface);
}

/* Notices and Tips */
.notice {
  margin-top: 24px;
  padding: 18px 24px;
  border-radius: var(--radius-lg);
  background: #fef8f0;
  border: 1px solid #fde6c7;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.65;
  box-shadow: var(--shadow-sm);
}

.notice strong {
  color: var(--warning);
  font-weight: 700;
}

/* Feature Cards (SEO COPY) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 24px;
}

.feature-card {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-hover);
}

.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-card h3::before {
  content: "✓";
  color: var(--primary);
  font-weight: bold;
}

.feature-card p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Google AdSense Container */
.adsense-container {
  margin: 24px auto;
  text-align: center;
  max-width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 0;
}

/* Premium AdSense Placeholder Layout */
.adsense-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 24px auto;
  padding: 16px;
  background: rgba(241, 245, 249, 0.4);
  border: 1px dashed var(--border-hover);
  border-radius: var(--radius-md);
  min-height: 120px;
  max-width: var(--max-width);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.adsense-placeholder::before {
  content: "ADVERTISEMENT";
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-light);
  margin-bottom: 8px;
}

.adsense-placeholder-inner {
  font-size: 12px;
  color: var(--text-light);
}

/* Document pages (about, privacy, contact) styling */
.document-container {
  max-width: var(--max-width-doc);
  margin: 0 auto;
  padding: 16px 0;
}

.doc-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 48px;
}

.doc-card h1 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.025em;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
  padding-bottom: 16px;
}

.doc-date {
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 24px;
}

.doc-card h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 36px;
  margin-bottom: 12px;
}

.doc-card p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 18px;
}

.info-box {
  margin: 24px 0;
  padding: 24px;
  border: 1px solid rgba(16, 185, 129, 0.15);
  border-radius: var(--radius-md);
  background: var(--primary-light);
}

.info-box strong {
  display: block;
  font-size: 15px;
  color: var(--primary-hover);
  margin-bottom: 6px;
  font-weight: 700;
}

.info-box p {
  margin: 0;
  font-size: 15px;
  color: var(--text-muted);
}

.info-box a {
  font-weight: 600;
  text-decoration: underline;
}

/* Footer Styling */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  padding: 24px 32px;
  margin-top: auto;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  max-width: var(--max-width);
  margin: 0 auto;
  font-size: 13px;
  color: var(--text-light);
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 16px;
}

.footer-links a {
  color: var(--text-muted);
  transition: var(--transition);
}

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

/* Custom Scrollbar Styles for premium feel */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-light);
}

/* Responsive Adjustments */
@media (max-width: 1024px) {
  .workspace {
    grid-template-columns: 1fr;
    gap: 12px;
    background: transparent;
  }
  
  .column {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
  }
  
  textarea {
    height: 520px;
    min-height: 520px;
  }
  
  .preview-box {
    height: 520px;
    min-height: 520px;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
}

@media (max-width: 768px) {
  main {
    padding: 16px 16px 32px;
  }
  
  .intro {
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 20px;
  }
  
  .intro-text h2 {
    align-items: flex-start;
    font-size: 26px;
  }

  .headline-icon {
    font-size: 24px;
    margin-top: 3px;
  }
  
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px;
    gap: 12px;
  }
  
  nav.site-nav {
    width: 100%;
  }
  
  nav.site-nav a {
    flex: 1;
    text-align: center;
    padding: 8px 8px;
  }
  
  .toolbar {
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
  }
  
  .toolbar-group {
    flex-direction: column;
    align-items: stretch;
  }
  
  .toolbar label, .btn {
    width: 100%;
    justify-content: space-between;
  }
  
  .column-head {
    height: auto;
    padding: 12px 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  
  .actions {
    justify-content: stretch;
  }
  
  .actions .btn {
    flex: 1;
  }
  
  .doc-card {
    padding: 24px 16px;
    border-radius: var(--radius-md);
  }
  
  .doc-card h1 {
    font-size: 24px;
  }
  
  .footer-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
  }
}