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

:root {
  --canvas: #ffffff;
  --ink: #000000;
  --accent: #0052cc;
  --accent-hover: #003d99;
  --border: #e5e5e5;
  --bg-light: #fafafa;
  --text-secondary: #555555;
  --text-tertiary: #6B7280;
  --font: 'Pretendard Std', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono: 'SFMono-Regular', 'Menlo', 'Monaco', 'Consolas', monospace;
  --radius: 4px;
  --header-h: 64px;
}

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

body {
  font-family: var(--font);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--canvas);
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s;
}
a:hover { color: var(--accent-hover); }

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

/* === Container === */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

/* === Header === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  border-bottom: 1px solid var(--border);
  height: var(--header-h);
  transition: transform 0.3s;
}

.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
}
.logo:hover { color: var(--ink); }

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-link {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
  padding: 10px 8px;
  min-height: 44px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.nav-link:hover { color: var(--ink); }

.nav-cta {
  color: var(--accent);
  font-weight: 700;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.mobile-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.2s;
}

/* === Hero === */
.hero {
  padding-top: calc(var(--header-h) + 80px);
  padding-bottom: 80px;
}

.hero-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-badge {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.hero-title {
  font-size: 56px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 48px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  padding: 14px 24px;
  min-height: 44px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #ffffff;
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--border);
}
.btn-outline:hover {
  border-color: var(--ink);
}

.btn-lg {
  padding: 16px 32px;
  font-size: 16px;
}

/* Hero Stats */
.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-num {
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.stat-label {
  font-size: 13px;
  color: var(--text-tertiary);
  margin-top: 4px;
}

.stat-divider {
  width: 1px;
  height: 32px;
  background: var(--border);
}

/* Hero Visual */
.hero-visual {
  position: relative;
}

.hero-image-wrapper {
  position: relative;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-image {
  width: 100%;
  height: 320px;
  object-fit: cover;
  display: block;
}

.hero-code-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(0,0,0,0.88);
  padding: 20px;
}

.hero-code-overlay pre {
  margin: 0;
}

.hero-code-overlay code {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  color: #e5e5e5;
}

.code-kw { color: #79b8ff; }
.code-str { color: #85e89d; }
.code-cmd { color: #ffab70; }

.photo-credit {
  font-size: 11px;
  color: var(--text-tertiary);
  margin-top: 8px;
}
.photo-credit a {
  color: var(--text-tertiary);
  display: inline-block;
  padding: 8px 0;
  min-height: 44px;
}
.photo-credit a:hover {
  color: var(--accent);
}

/* === Features === */
.features {
  padding: 96px 0;
  background: var(--bg-light);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-badge {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--canvas);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: border-color 0.15s;
}
.feature-card:hover {
  border-color: var(--accent);
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
}

.feature-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* === Templates === */
.templates {
  padding: 96px 0;
}

/* Filter Bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

.filter-search {
  position: relative;
  flex: 0 0 280px;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  pointer-events: none;
}

.search-input {
  width: 100%;
  font-family: var(--font);
  font-size: 14px;
  padding: 10px 12px 10px 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--canvas);
  color: var(--ink);
  transition: border-color 0.15s;
}
.search-input:focus {
  border-color: var(--accent);
  outline: 2px solid var(--accent);
  outline-offset: -1px;
}
.search-input::placeholder {
  color: var(--text-tertiary);
}

.filter-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pill {
  font-family: var(--font);
  font-size: 13px;
  font-weight: 400;
  padding: 10px 16px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--canvas);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.15s;
}
.pill:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.pill.active {
  background: var(--ink);
  color: var(--canvas);
  border-color: var(--ink);
}

/* Template Grid */
.template-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.template-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.15s;
  background: var(--canvas);
}
.template-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.template-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.template-card-title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.3;
}

.template-card-category {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--accent);
  white-space: nowrap;
  padding: 2px 8px;
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  flex-shrink: 0;
}

.template-card-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
}

.template-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.template-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.template-tag {
  font-size: 12px;
  color: var(--text-tertiary);
  background: var(--bg-light);
  padding: 2px 8px;
  border-radius: var(--radius);
}

.template-card-copy {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px 8px;
  min-height: 44px;
  border-radius: var(--radius);
  transition: background 0.15s;
}
.template-card-copy:hover {
  background: rgba(0,82,204,0.08);
}

.empty-state {
  text-align: center;
  padding: 64px 0;
  color: var(--text-tertiary);
}
.empty-state p {
  margin-top: 16px;
  font-size: 15px;
}

/* === CTA Section === */
.cta-section {
  padding: 96px 0;
  background: var(--bg-light);
  border-top: 1px solid var(--border);
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

.cta-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.cta-desc {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 480px;
}

/* === Footer === */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-logo {
  font-size: 16px;
  font-weight: 700;
}

.footer-desc {
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer-links {
  display: flex;
  gap: 24px;
}
.footer-links a {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 10px 0;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-tertiary);
  width: 100%;
  text-align: center;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

/* === Modal === */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  animation: fadeIn 0.2s;
}

.modal {
  background: var(--canvas);
  border-radius: var(--radius);
  width: 100%;
  max-width: 720px;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  animation: slideUp 0.25s;
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 24px 24px 0;
}

.modal-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.modal-meta {
  display: flex;
  gap: 8px;
  align-items: center;
}

.modal-category {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
}

.modal-tag {
  font-size: 11px;
  color: var(--text-tertiary);
  background: var(--bg-light);
  padding: 2px 8px;
  border-radius: var(--radius);
}

.modal-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-secondary);
  padding: 10px;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  transition: background 0.15s;
}
.modal-close:hover {
  background: var(--bg-light);
}

.modal-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  padding: 12px 24px 0;
}

.modal-yaml-wrapper {
  margin: 16px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  flex: 1;
  min-height: 0;
}

.yaml-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background: var(--bg-light);
  border-bottom: 1px solid var(--border);
}

.yaml-filename {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-tertiary);
}

.btn-copy {
  display: flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font);
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px 8px;
  min-height: 44px;
  border-radius: var(--radius);
  transition: background 0.15s;
}
.btn-copy:hover {
  background: rgba(0,82,204,0.08);
}

.yaml-content {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
  padding: 16px;
  overflow: auto;
  max-height: 50vh;
  color: var(--ink);
  background: var(--canvas);
  white-space: pre;
  tab-size: 2;
}

.modal-footer {
  padding: 16px 24px 24px;
  display: flex;
  justify-content: flex-end;
}

/* === Toast === */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  z-index: 300;
  background: var(--canvas);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  animation: toastIn 0.3s forwards;
}

/* === Animations === */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastIn {
  from { transform: translateX(-50%) translateY(100px); }
  to { transform: translateX(-50%) translateY(0); }
}

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

@keyframes fadeRight {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeLeft {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

[data-animate="fade-up"] {
  opacity: 0;
}
[data-animate="fade-up"].visible {
  animation: fadeUp 0.5s forwards;
}

[data-animate="fade-right"] {
  opacity: 0;
}
[data-animate="fade-right"].visible {
  animation: fadeRight 0.5s forwards;
}

[data-animate="fade-left"] {
  opacity: 0;
}
[data-animate="fade-left"].visible {
  animation: fadeLeft 0.5s forwards;
}

/* === Responsive === */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero-title {
    font-size: 40px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .template-grid {
    grid-template-columns: 1fr;
  }
  .cta-inner {
    flex-direction: column;
    text-align: center;
  }
  .cta-desc {
    max-width: 100%;
  }
  .filter-bar {
    flex-direction: column;
    align-items: stretch;
  }
  .filter-search {
    flex: 1;
  }
}

@media (max-width: 600px) {
  .hero {
    padding-top: calc(var(--header-h) + 48px);
    padding-bottom: 48px;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-stats {
    gap: 16px;
  }
  .stat-num {
    font-size: 24px;
  }
  .nav {
    display: none;
  }
  .mobile-menu-btn {
    display: flex;
  }
  .section-title {
    font-size: 28px;
  }
  .modal {
    max-height: 95vh;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
  .footer-links {
    justify-content: center;
  }
}

/* Mobile nav open state */
.nav.open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: var(--header-h);
  left: 0;
  right: 0;
  background: var(--canvas);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  gap: 16px;
}

/* Scrollbar */
.yaml-content::-webkit-scrollbar {
  width: 6px;
}
.yaml-content::-webkit-scrollbar-track {
  background: var(--bg-light);
}
.yaml-content::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

/* Focus visible */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}