:root {
  color-scheme: light;
  --bg: #f7faf9;
  --surface: #ffffff;
  --surface-strong: #eef6f5;
  --text: #172321;
  --muted: #5d6f6b;
  --line: #d9e6e3;
  --primary: #196b69;
  --primary-dark: #0f4f4e;
  --accent: #c95f3f;
  --gold: #b8860b;
  --green: #2f7d4f;
  --shadow: 0 16px 44px rgba(21, 47, 43, 0.12);
  --radius: 8px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #111917;
  --surface: #182522;
  --surface-strong: #20332f;
  --text: #edf5f2;
  --muted: #b7c8c4;
  --line: #314842;
  --primary: #7fc9c3;
  --primary-dark: #b6ebe6;
  --accent: #f0a17f;
  --gold: #e4c66b;
  --green: #95d8ac;
  --shadow: 0 16px 44px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, "Noto Sans KR", "Malgun Gothic", sans-serif;
  line-height: 1.65;
}

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

button,
input,
select {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 250, 249, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

:root[data-theme="dark"] .site-header {
  background: rgba(17, 25, 23, 0.94);
}

.nav {
  width: min(1180px, calc(100% - 32px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 168px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 0.82rem;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  flex-wrap: wrap;
}

.nav-links a {
  padding: 8px 10px;
  border-radius: var(--radius);
  color: var(--muted);
  font-weight: 700;
  font-size: 0.94rem;
}

.nav-links a:hover {
  background: var(--surface-strong);
  color: var(--primary-dark);
}

.nav-links a[aria-current="page"] {
  background: var(--surface-strong);
  color: var(--primary-dark);
}

.theme-toggle {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: 0 10px;
  cursor: pointer;
  font-weight: 800;
  white-space: nowrap;
}

.theme-toggle::before {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: inset -4px -4px 0 rgba(255, 255, 255, 0.55);
}

:root[data-theme="dark"] .theme-toggle::before {
  box-shadow: inset 4px -4px 0 rgba(17, 25, 23, 0.95);
}

.theme-toggle:hover {
  background: var(--surface-strong);
  color: var(--primary-dark);
}

.hero,
.section,
.site-footer {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.hero {
  min-height: 520px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  align-items: center;
  gap: 42px;
  padding: 54px 0 36px;
}

.page-hero {
  width: min(900px, calc(100% - 32px));
  margin: 0 auto;
  padding: 72px 0 42px;
}

.page-hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.6rem);
}

.page-hero p {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.05rem;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--primary);
  font-weight: 800;
  font-size: 0.9rem;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(3rem, 8vw, 6.8rem);
  line-height: 0.98;
}

h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  line-height: 1.2;
}

h3 {
  margin: 0 0 4px;
  font-size: 1.25rem;
  line-height: 1.3;
}

h4 {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.3;
}

.hero-text,
.section-head p,
.prose p {
  color: var(--muted);
}

.hero-text {
  max-width: 720px;
  font-size: 1.08rem;
}

.hero-panel {
  display: grid;
  gap: 12px;
}

.metric {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 2px 14px;
  align-items: center;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.metric span {
  grid-row: span 2;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--surface-strong);
  color: var(--primary-dark);
  font-weight: 800;
}

.metric small {
  color: var(--muted);
}

.section {
  padding: 58px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 790px;
  margin-bottom: 24px;
}

.tool-shell {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.tool-tabs {
  display: flex;
  gap: 1px;
  background: var(--line);
  overflow-x: auto;
}

.tool-tab {
  min-height: 52px;
  padding: 0 18px;
  border: 0;
  background: var(--surface-strong);
  color: var(--muted);
  cursor: pointer;
  font-weight: 800;
  white-space: nowrap;
}

.tool-tab.is-active {
  background: var(--surface);
  color: var(--primary-dark);
}

.tool-panel {
  padding: 24px;
}

.tool-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.tool-header p {
  margin: 0;
  color: var(--muted);
}

.tool-badge {
  align-self: start;
  padding: 5px 9px;
  border-radius: var(--radius);
  background: #fff3eb;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
}

:root[data-theme="dark"] .tool-badge {
  background: #3d2d26;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--text);
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  background: var(--surface);
  color: var(--text);
}

input,
select {
  min-height: 46px;
}

textarea {
  min-height: 260px;
  resize: vertical;
  line-height: 1.45;
}

input:focus,
select:focus,
textarea:focus,
button:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(25, 107, 105, 0.22);
  outline-offset: 2px;
}

.field-help {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.result-box {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  color: var(--text);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.result-item {
  padding: 12px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}

.result-item span {
  display: block;
  color: var(--muted);
  font-size: 0.86rem;
}

.result-item strong {
  display: block;
  margin-top: 2px;
  font-size: 1.1rem;
}

.tool-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.secondary-button {
  min-height: 42px;
  border: 1px solid var(--primary);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--primary-dark);
  padding: 0 14px;
  cursor: pointer;
  font-weight: 800;
  white-space: normal;
}

.secondary-button:hover {
  background: var(--surface-strong);
}

.primary-button {
  min-height: 42px;
  border: 1px solid var(--primary);
  border-radius: var(--radius);
  background: var(--primary);
  color: #fff;
  padding: 0 16px;
  cursor: pointer;
  font-weight: 800;
  white-space: normal;
}

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

.primary-button:disabled {
  cursor: wait;
  opacity: 0.68;
}

.status-text {
  color: var(--green);
  font-weight: 800;
}

.editor-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.95fr) minmax(320px, 1.05fr);
  gap: 20px;
  align-items: start;
}

.editor-preview {
  min-width: 0;
}

.editor-video {
  width: 100%;
  aspect-ratio: 16 / 9;
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #0c1413;
}

.editor-readout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.editor-readout span {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  color: var(--muted);
  font-size: 0.9rem;
}

.editor-readout strong {
  display: block;
  color: var(--text);
  font-size: 1rem;
}

.save-panel {
  margin-top: 12px;
}

.editor-controls {
  display: grid;
  gap: 10px;
}

.control-section {
  display: grid;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.control-section h4,
.compact-details summary {
  color: var(--primary-dark);
  font-weight: 900;
}

.compact-details summary {
  cursor: pointer;
  list-style-position: inside;
}

.compact-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.range-row {
  display: grid;
  gap: 8px;
}

input[type="range"] {
  padding: 0;
  min-height: 30px;
}

.nudge-panel {
  display: grid;
  gap: 10px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  border: 0;
}

.nudge-panel div {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-wrap: wrap;
}

.nudge-panel span {
  min-width: 38px;
  color: var(--muted);
  font-weight: 800;
  font-size: 0.9rem;
}

.quick-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.quick-actions button {
  min-height: 48px;
  height: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  line-height: 1.25;
  overflow-wrap: normal;
  word-break: keep-all;
}

.save-actions {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.subtitle-layout {
  display: grid;
  gap: 14px;
}

.preview-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.tiny-button {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--primary-dark);
  padding: 0 9px;
  cursor: pointer;
  font-weight: 800;
}

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

.export-progress {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
}

.export-progress div {
  width: 0%;
  height: 100%;
  background: var(--primary);
  transition: width 0.18s ease;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.info-card,
.faq-item {
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.info-card p,
.faq-item p {
  margin-bottom: 0;
  color: var(--muted);
}

.section-link {
  margin: 20px 0 0;
  font-weight: 900;
  color: var(--primary-dark);
}

.article-list {
  display: grid;
  gap: 28px;
}

.guide-article {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow-x: auto;
}

.guide-article h2 {
  margin-bottom: 14px;
}

.guide-article h3 {
  margin-top: 24px;
}

.guide-article p,
.guide-article li {
  color: var(--muted);
}

.guide-article table {
  width: 100%;
  margin-top: 14px;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.guide-article th,
.guide-article td {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.guide-article th {
  background: var(--surface-strong);
  color: var(--text);
}

.guide-article tr:last-child td {
  border-bottom: 0;
}

.split-section {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 36px;
}

.prose p:first-child {
  margin-top: 0;
}

.prose h2,
.prose h3 {
  margin-top: 28px;
}

.prose ul {
  margin: 10px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.prose li + li {
  margin-top: 6px;
}

.content-page {
  width: min(900px, calc(100% - 32px));
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item h3 {
  font-size: 1.05rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 34px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer p {
  margin: 4px 0 0;
}

.footer-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  font-weight: 800;
}

.floating-links {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 30;
  display: flex;
  gap: 6px;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

:root[data-theme="dark"] .floating-links {
  background: rgba(24, 37, 34, 0.96);
}

.floating-links a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 10px;
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
  word-break: keep-all;
}

.floating-links a:hover,
.floating-links a[aria-current="page"] {
  background: var(--surface-strong);
  color: var(--primary-dark);
}

@media (max-width: 900px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .nav-links {
    justify-content: flex-start;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 38px;
  }

  .form-grid,
  .info-grid,
  .editor-layout,
  .preview-columns,
  .split-section {
    grid-template-columns: 1fr;
  }

  .compact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .quick-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .save-actions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .tool-header,
  .site-footer {
    flex-direction: column;
  }

  .footer-links {
    justify-content: flex-start;
  }

  .floating-links {
    left: 12px;
    right: 12px;
    bottom: 12px;
    justify-content: center;
  }
}

@media (max-width: 560px) {
  .hero,
  .page-hero,
  .section,
  .site-footer,
  .nav {
    width: min(100% - 22px, 1180px);
  }

  .nav-links a {
    padding: 7px 8px;
    font-size: 0.9rem;
  }

  .floating-links {
    gap: 4px;
    padding: 6px;
  }

  .floating-links a {
    flex: 1;
    min-height: 36px;
    padding: 0 6px;
    font-size: 0.82rem;
  }

  .tool-panel {
    padding: 16px;
  }

  .tool-tab {
    padding: 0 14px;
    font-size: 0.92rem;
  }

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

  .editor-readout {
    grid-template-columns: 1fr;
  }

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

  .quick-actions {
    grid-template-columns: 1fr;
  }

  .save-actions {
    grid-template-columns: 1fr;
  }
}