:root {
  --black: #0a0a0a;
  --black-pure: #000000;
  --surface: #121212;
  --surface-elevated: #1c1c1c;
  --surface-hover: #252525;

  --lime: #d4ff00;
  --lime-dim: #b8e600;
  --lime-glow: rgba(212, 255, 0, 0.18);
  --lime-glow-strong: rgba(212, 255, 0, 0.4);
  --lime-bg: rgba(200, 255, 0, 0.06);

  --green: #00ff41;
  --amber: #ffb800;
  --red: #ff3b3b;
  --cyan: #00e5ff;
  --magenta: #ff00e5;

  --border: rgba(212, 255, 0, 0.18);
  --border-strong: rgba(212, 255, 0, 0.4);
  --border-muted: rgba(255, 255, 255, 0.1);

  --text: #f5f5f5;
  --text-dim: #aaaaaa;
  --text-muted: #777777;

  --json-key: var(--lime);
  --json-string: var(--green);
  --json-number: var(--amber);
  --json-bool: var(--cyan);
  --json-null: var(--red);

  --sp-xs: 4px;
  --sp-sm: 8px;
  --sp-md: 16px;
  --sp-lg: 24px;
  --sp-xl: 40px;
  --sp-2xl: 64px;

  --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Space Mono', 'JetBrains Mono', monospace;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --t-fast: 120ms var(--ease);
  --t-normal: 220ms var(--ease);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--black);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

.grid-overlay {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--border-muted) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-muted) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.45;
}

.app-shell {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-md);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-md) 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--sp-xl);
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
}

.logo-mark {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--lime);
}

.logo-bracket {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--lime-dim);
}

.logo-text {
  display: flex;
  align-items: baseline;
  gap: var(--sp-sm);
}

.logo-name {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: var(--text);
}

.logo-sep {
  color: var(--text-muted);
  font-weight: 400;
}

.logo-tag {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: var(--sp-sm);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 8px var(--lime-glow-strong);
  animation: dot-pulse 2s ease-in-out infinite;
}

@keyframes dot-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.nav-label {
  font-family: var(--font-mono);
}

.nav-divider {
  color: var(--text-muted);
}

.nav-link {
  color: var(--lime);
  text-decoration: none;
  font-family: var(--font-mono);
  font-weight: 700;
  transition: opacity var(--t-fast);
}

.nav-link:hover {
  opacity: 0.7;
}

.hero {
  margin-bottom: var(--sp-2xl);
  padding: var(--sp-xl) 0;
}

.hero-title {
  font-family: var(--font-sans);
  font-size: clamp(2.4rem, 6.5vw, 4.2rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--lime);
  text-transform: uppercase;
  text-shadow: 0 0 40px rgba(212, 255, 0, 0.15);
}

.hero-highlight {
  color: var(--text);
  display: inline-block;
  position: relative;
}

.hero-highlight::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--lime);
  opacity: 0.5;
}

.hero-sub {
  margin-top: var(--sp-lg);
  font-size: 0.95rem;
  color: var(--text-dim);
  max-width: 540px;
  line-height: 1.65;
  font-weight: 400;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  position: relative;
}

.panel::before {
  content: '';
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--lime-dim), transparent);
  opacity: 0;
  transition: opacity var(--t-normal);
}

.panel:hover::before {
  opacity: 0.5;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-md) var(--sp-lg);
  border-bottom: 1px solid var(--border);
}

.panel-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--lime-dim);
}

.panel-actions {
  display: flex;
  gap: var(--sp-xs);
}

.action-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  background: none;
  border: 1px solid var(--border-muted);
  padding: 4px 10px;
  cursor: pointer;
  transition: all var(--t-fast);
}

.action-btn:hover {
  color: var(--lime);
  border-color: var(--lime);
  background: var(--lime-bg);
}

.action-btn.copied {
  color: var(--green);
  border-color: var(--green);
}

.input-panel {
  margin-bottom: var(--sp-lg);
}

.input-area {
  padding: 0;
}

#cookie-input {
  width: 100%;
  min-height: 150px;
  padding: var(--sp-lg);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--lime);
  background: var(--black-pure);
  border: none;
  outline: none;
  resize: vertical;
  word-break: break-all;
  caret-color: var(--lime);
}

#cookie-input::placeholder {
  color: var(--text-muted);
}

#cookie-input::selection {
  background: var(--lime);
  color: var(--black);
}

.input-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-sm) var(--sp-lg);
  border-top: 1px solid var(--border);
  gap: var(--sp-sm);
  flex-wrap: wrap;
}

.char-count {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.sample-row {
  display: flex;
  gap: var(--sp-xs);
}

.sample-btn {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  background: none;
  border: 1px solid var(--border-muted);
  padding: 3px 10px;
  cursor: pointer;
  transition: all var(--t-fast);
}

.sample-btn:hover {
  color: var(--lime);
  border-color: var(--lime);
  background: var(--lime-bg);
}

.decode-btn {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--black);
  background: var(--lime);
  border: none;
  padding: 8px 28px;
  cursor: pointer;
  transition: all var(--t-fast);
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
}

.decode-btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.2) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.6s var(--ease);
}

.decode-btn:hover:not(:disabled)::after {
  transform: translateX(100%);
}

.decode-btn:hover:not(:disabled) {
  background: var(--lime-dim);
  box-shadow: 0 0 30px var(--lime-glow-strong);
}

.decode-btn:disabled {
  opacity: 0.25;
  cursor: not-allowed;
}

.decode-btn:active:not(:disabled) {
  transform: scale(0.97);
}

.output-area {
  display: flex;
  flex-direction: column;
  gap: var(--sp-lg);
  animation: reveal 0.5s var(--ease);
}

.output-area.hidden {
  display: none;
}

@keyframes reveal {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}


.json-output {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.9;
  padding: var(--sp-lg);
  background: var(--black-pure);
  white-space: pre;
  overflow-x: auto;
  overflow-y: auto;
  max-height: 480px;
  tab-size: 2;
  border-top: none;
}

.json-key { color: var(--json-key); }
.json-string { color: var(--json-string); }
.json-number { color: var(--json-number); }
.json-bool { color: var(--json-bool); }
.json-null { color: var(--json-null); }

.json-output::-webkit-scrollbar { width: 4px; height: 4px; }
.json-output::-webkit-scrollbar-track { background: transparent; }
.json-output::-webkit-scrollbar-thumb {
  background: var(--border-strong);
}

.inspector-strip {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border: 1px solid var(--border);
}

.inspect-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: var(--sp-md);
  background: var(--surface);
  border-right: 1px solid var(--border);
  transition: background var(--t-fast);
}

.inspect-cell:last-child {
  border-right: none;
}

.inspect-cell:hover {
  background: var(--surface-elevated);
}

.inspect-label {
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-muted);
}

.inspect-value {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--lime);
  font-weight: 700;
  word-break: break-all;
}

.data-table-wrapper {
  overflow-x: auto;
  background: var(--black-pure);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.data-table th {
  text-align: left;
  padding: var(--sp-sm) var(--sp-lg);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
}

.data-table td {
  padding: var(--sp-sm) var(--sp-lg);
  border-bottom: 1px solid var(--border-muted);
  vertical-align: top;
}

.data-table tr:last-child td {
  border-bottom: none;
}

.data-table tr:hover td {
  background: var(--surface);
}

.data-table .key-cell {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--lime);
  white-space: nowrap;
  width: 1%;
}

.data-table .value-cell {
  font-family: var(--font-mono);
  color: var(--text);
  word-break: break-all;
}

.data-table .type-cell {
  white-space: nowrap;
  width: 1%;
}

.type-badge {
  display: inline-block;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid;
}

.type-badge.string { color: var(--green); border-color: rgba(0,255,65,0.2); }
.type-badge.number { color: var(--amber); border-color: rgba(255,184,0,0.2); }
.type-badge.boolean { color: var(--cyan); border-color: rgba(0,229,255,0.2); }
.type-badge.null { color: var(--red); border-color: rgba(255,59,59,0.2); }
.type-badge.object { color: var(--magenta); border-color: rgba(255,0,229,0.2); }
.type-badge.array { color: var(--lime); border-color: var(--border); }

.error-section {
  animation: reveal 0.5s var(--ease);
}

.error-section.hidden {
  display: none;
}

.error-panel {
  border-color: rgba(255, 59, 59, 0.25);
  padding: var(--sp-xl);
}

.error-header {
  display: flex;
  align-items: center;
  gap: var(--sp-md);
  margin-bottom: var(--sp-md);
}

.error-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--red);
  border: 1px solid rgba(255, 59, 59, 0.3);
  padding: 3px 10px;
}

.error-header h3 {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.06em;
}

.error-msg {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.6;
}

.error-details {
  margin-top: var(--sp-lg);
}

.error-details summary {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  cursor: pointer;
  transition: color var(--t-fast);
}

.error-details summary:hover {
  color: var(--text-dim);
}

.error-details pre {
  margin-top: var(--sp-sm);
  padding: var(--sp-md);
  background: var(--black-pure);
  border: 1px solid var(--border-muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--red);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  line-height: 1.7;
}

.app-footer {
  margin-top: auto;
  padding: var(--sp-xl) 0 var(--sp-lg);
}

.footer-line {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin-bottom: var(--sp-md);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-md);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.footer-dot {
  color: var(--lime-dim);
  font-size: 0.4rem;
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(60px);
  background: var(--surface-elevated);
  color: var(--lime);
  padding: 8px 20px;
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  z-index: 1000;
  opacity: 0;
  transition: all var(--t-normal);
  pointer-events: none;
}

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

.hidden {
  display: none !important;
}

@media (max-width: 768px) {
  .inspector-strip {
    grid-template-columns: repeat(3, 1fr);
  }

  .inspect-cell:nth-child(3) {
    border-right: none;
  }

  .hero-title {
    font-size: 2rem;
  }

  .top-bar-right .nav-label {
    display: none;
  }
}

@media (max-width: 480px) {
  .inspector-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .inspect-cell:nth-child(2n) {
    border-right: none;
  }

  .input-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .decode-btn {
    width: 100%;
    text-align: center;
  }

  .sample-row {
    justify-content: center;
  }

  .footer-content {
    flex-direction: column;
    gap: var(--sp-sm);
  }

  .footer-dot {
    display: none;
  }
}

.seo-content {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--sp-2xl) var(--sp-md) var(--sp-xl);
}

.seo-inner {
  border-top: 1px solid var(--border);
  padding-top: var(--sp-xl);
}

.seo-content h2 {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
  margin-bottom: var(--sp-md);
  margin-top: var(--sp-xl);
}

.seo-content h2:first-child {
  margin-top: 0;
}

.seo-content p {
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.75;
  max-width: 720px;
  margin-bottom: var(--sp-md);
}

.seo-content ul {
  list-style: none;
  padding: 0;
  margin-bottom: var(--sp-lg);
}

.seo-content ul li {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.7;
  padding: var(--sp-xs) 0;
  padding-left: var(--sp-lg);
  position: relative;
}

.seo-content ul li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--lime-dim);
  font-family: var(--font-mono);
  font-weight: 700;
}

.seo-content ul li strong {
  color: var(--lime);
  font-weight: 600;
}

.seo-content details {
  margin-bottom: var(--sp-sm);
  border: 1px solid var(--border-muted);
  background: var(--surface);
  transition: border-color var(--t-fast);
}

.seo-content details:hover {
  border-color: var(--border);
}

.seo-content details[open] {
  border-color: var(--border-strong);
}

.seo-content details summary {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  padding: var(--sp-md) var(--sp-lg);
  cursor: pointer;
  transition: color var(--t-fast);
  list-style: none;
}

.seo-content details summary::-webkit-details-marker {
  display: none;
}

.seo-content details summary::before {
  content: '+ ';
  font-family: var(--font-mono);
  color: var(--lime-dim);
  font-weight: 700;
}

.seo-content details[open] summary::before {
  content: '− ';
}

.seo-content details summary:hover {
  color: var(--lime);
}

.seo-content details p {
  padding: 0 var(--sp-lg) var(--sp-md);
  margin: 0;
}

.seo-content code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--lime);
  background: var(--lime-bg);
  padding: 1px 6px;
  border: 1px solid var(--border-muted);
}

::selection {
  background: var(--lime);
  color: var(--black);
}