:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5b667a;
  --line: #dfe6f0;
  --soft: #f5f8fc;
  --panel: #ffffff;
  --accent: #0ea5a3;
  --accent-dark: #087f7e;
  --accent-soft: #dff7f6;
  --warn: #f59e0b;
  --danger: #dc2626;
  --ok: #16a34a;
  --shadow: 0 18px 45px rgba(23, 32, 51, 0.1);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --ink: #edf6ff;
  --muted: #a8b7c8;
  --line: #243246;
  --soft: #111a27;
  --panel: #121d2b;
  --accent: #2dd4bf;
  --accent-dark: #5eead4;
  --accent-soft: rgba(45, 212, 191, 0.14);
  --warn: #fbbf24;
  --danger: #fb7185;
  --ok: #4ade80;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(14, 165, 163, 0.16), transparent 30rem),
    linear-gradient(180deg, #f9fcff 0%, #ffffff 45%);
  line-height: 1.6;
}

html[data-theme="dark"] body {
  background:
    radial-gradient(circle at top left, rgba(45, 212, 191, 0.14), transparent 30rem),
    linear-gradient(180deg, #08111d 0%, #0c1522 45%, #0f1724 100%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(223, 230, 240, 0.75);
  backdrop-filter: blur(14px);
}

html[data-theme="dark"] .site-header {
  background: rgba(9, 17, 29, 0.88);
  border-bottom-color: rgba(36, 50, 70, 0.85);
}

.nav {
  max-width: 1160px;
  margin: 0 auto;
  padding: 16px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  color: white;
  background: var(--accent);
  border-radius: 8px;
  box-shadow: 0 10px 24px rgba(14, 165, 163, 0.28);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-links a {
  padding: 8px 11px;
  color: var(--muted);
  border-radius: 7px;
  font-size: 14px;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent-dark);
  background: var(--accent-soft);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  position: relative;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  cursor: pointer;
}

.theme-toggle::before {
  content: "";
  width: 17px;
  height: 17px;
  border: 2px solid var(--accent-dark);
  border-radius: 50%;
  background: var(--accent-soft);
}

.theme-toggle::after {
  content: "";
  position: absolute;
  width: 7px;
  height: 7px;
  top: 9px;
  right: 9px;
  border-radius: 50%;
  background: var(--accent-dark);
  opacity: 0;
}

html[data-theme="dark"] .theme-toggle::before {
  transform: translateX(4px);
  background: transparent;
  box-shadow: -7px 0 0 0 var(--accent-dark);
  border-color: transparent;
}

html[data-theme="dark"] .theme-toggle::after {
  opacity: 1;
}

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 22px;
}

.hero {
  padding: 76px 0 34px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 38px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-weight: 800;
  text-transform: uppercase;
  font-size: 13px;
  letter-spacing: 0.08em;
}

h1,
h2,
h3 {
  line-height: 1.15;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: clamp(42px, 7vw, 72px);
}

h2 {
  margin: 0 0 18px;
  font-size: clamp(26px, 3vw, 38px);
}

h3 {
  margin: 0 0 8px;
  font-size: 19px;
}

.lead {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 18px;
  max-width: 680px;
}

.hero-panel,
.tool-panel,
.info-panel {
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

html[data-theme="dark"] .hero-panel,
html[data-theme="dark"] .tool-panel,
html[data-theme="dark"] .info-panel {
  background: rgba(18, 29, 43, 0.94);
}

.hero-panel {
  padding: 24px;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.mini-stat {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.mini-stat strong {
  display: block;
  font-size: 28px;
  line-height: 1;
}

.mini-stat span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 54px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 24px;
}

.grid {
  display: grid;
  gap: 18px;
}

.tool-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.related-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  display: flex;
  min-height: 210px;
  flex-direction: column;
  justify-content: space-between;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(14, 165, 163, 0.45);
  box-shadow: var(--shadow);
}

.icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  border-radius: 8px;
  color: var(--accent-dark);
  background: var(--accent-soft);
  font-weight: 900;
}

.card p,
.muted {
  color: var(--muted);
}

.card p {
  margin: 0 0 18px;
  font-size: 15px;
}

.link-arrow {
  color: var(--accent-dark);
  font-weight: 800;
}

.tool-hero {
  padding: 52px 0 22px;
}

.tool-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 24px;
  align-items: start;
}

.tool-panel,
.info-panel {
  padding: 24px;
}

.field,
.controls {
  display: grid;
  gap: 12px;
}

label {
  font-weight: 800;
  font-size: 14px;
}

textarea:not(.inputarea):not(.ime-text-area),
input[type="text"],
input[type="url"],
input[type="number"],
input[type="date"],
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 13px 14px;
  color: var(--ink);
  background: white;
  font: inherit;
  outline: none;
}

html[data-theme="dark"] textarea:not(.inputarea):not(.ime-text-area),
html[data-theme="dark"] input[type="text"],
html[data-theme="dark"] input[type="url"],
html[data-theme="dark"] input[type="number"],
html[data-theme="dark"] input[type="date"],
html[data-theme="dark"] select {
  background: #0b1421;
}

textarea:not(.inputarea):not(.ime-text-area) {
  min-height: 190px;
  resize: vertical;
}

textarea:not(.inputarea):not(.ime-text-area):focus,
input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(14, 165, 163, 0.13);
}

.button-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 8px;
  color: white;
  background: var(--accent);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

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

.btn.secondary {
  color: var(--ink);
  background: white;
  border-color: var(--line);
}

.btn.secondary:hover {
  color: var(--accent-dark);
  background: var(--accent-soft);
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.stat {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.stat strong {
  display: block;
  font-size: 28px;
  line-height: 1.1;
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.option-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.split-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.check-option {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
  font-weight: 700;
}

.check-option input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.range-row {
  display: grid;
  grid-template-columns: 1fr 70px;
  gap: 12px;
  align-items: center;
}

input[type="range"] {
  accent-color: var(--accent);
}

input[type="file"] {
  width: 100%;
  padding: 14px;
  border: 1px dashed rgba(14, 165, 163, 0.55);
  border-radius: 8px;
  background: #f3fffe;
  font: inherit;
}

html[data-theme="dark"] input[type="file"],
html[data-theme="dark"] .result-box {
  background: rgba(45, 212, 191, 0.08);
}

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

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

.result-box {
  margin-top: 18px;
  padding: 16px;
  border: 1px dashed rgba(14, 165, 163, 0.55);
  border-radius: 8px;
  background: #f3fffe;
  overflow-wrap: anywhere;
}

.result-box strong {
  font-size: 26px;
}

.code-output {
  min-height: 260px;
  white-space: pre;
  overflow: auto;
  font-family: Consolas, "SFMono-Regular", Menlo, Monaco, monospace;
  font-size: 14px;
  line-height: 1.5;
}

.tool-status {
  min-height: 24px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.tool-status.ok {
  color: var(--ok);
}

.tool-status.error {
  color: var(--danger);
}

.editor-shell {
  min-height: 520px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.monaco-host,
.editor-fallback {
  width: 100%;
  height: 520px;
}

.editor-fallback {
  display: none;
  border: 0;
  border-radius: 0;
  padding: 13px 14px;
  color: var(--ink);
  background: white;
  font-family: Consolas, "SFMono-Regular", Menlo, Monaco, monospace;
  font-size: 14px;
  resize: vertical;
}

html[data-theme="dark"] .editor-fallback {
  background: #0b1421;
}

.editor-shell.fallback .monaco-host {
  display: none;
}

.editor-shell.fallback .editor-fallback {
  display: block;
}

.preview-box {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.preview-box img,
.preview-box canvas {
  max-width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
}

.file-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.file-meta span {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: var(--soft);
  font-size: 13px;
}

.strength-track {
  height: 10px;
  margin-top: 10px;
  overflow: hidden;
  background: var(--line);
  border-radius: 999px;
}

.strength-bar {
  width: 0;
  height: 100%;
  background: var(--danger);
  transition: width 0.2s ease, background 0.2s ease;
}

.qr-output {
  display: grid;
  place-items: center;
  min-height: 320px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.qr-output canvas {
  width: min(260px, 82vw);
  height: min(260px, 82vw);
  image-rendering: pixelated;
  background: white;
}

.limit-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.limit-item {
  display: grid;
  gap: 7px;
}

.limit-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 14px;
}

.progress {
  height: 9px;
  overflow: hidden;
  background: var(--line);
  border-radius: 999px;
}

.progress span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--accent);
}

.content-block {
  max-width: 860px;
}

.content-block p,
.content-block li {
  color: var(--muted);
}

.steps,
.faq {
  display: grid;
  gap: 14px;
}

.steps li,
.faq article,
.plain-panel {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.site-footer {
  margin-top: 48px;
  border-top: 1px solid var(--line);
  background: #ffffff;
}

html[data-theme="dark"] .site-footer {
  background: #0b1421;
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 28px 22px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.footer-link-button {
  padding: 0;
  border: 0;
  color: inherit;
  background: transparent;
  font: inherit;
  cursor: pointer;
}

.footer-links a:hover,
.footer-link-button:hover {
  color: var(--accent-dark);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 22px;
  z-index: 40;
  transform: translateX(-50%) translateY(20px);
  padding: 12px 16px;
  color: white;
  background: var(--ink);
  border-radius: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.cookie-banner {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 60;
  width: min(620px, calc(100vw - 44px));
  display: grid;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  transform: translateY(22px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.cookie-banner.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.cookie-copy h2 {
  margin: 0 0 8px;
  font-size: 18px;
}

.cookie-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.cookie-copy a {
  display: inline-block;
  margin-top: 8px;
  color: var(--accent-dark);
  font-weight: 800;
  font-size: 14px;
}

.cookie-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

@media (max-width: 980px) {
  .hero,
  .tool-shell {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 640px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero {
    padding-top: 44px;
  }

  .hero-grid,
  .tool-grid,
  .related-grid,
  .option-grid,
  .split-grid,
  .form-grid,
  .form-grid.three,
  .file-meta,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .tool-panel,
  .info-panel,
  .hero-panel {
    padding: 18px;
  }

  .cookie-banner {
    left: 14px;
    right: 14px;
    bottom: 14px;
    width: auto;
  }

  .cookie-actions {
    justify-content: stretch;
  }

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

  h1 {
    font-size: 40px;
  }
}