/* Hand-written, no build step required - keeps pages fast (no CDN utility-CSS
   payload) and gives the site a consistent, hand-tuned responsive design. */

:root {
  --color-bg: #f7f8fa;
  --color-surface: #ffffff;
  --color-border: #e2e5ea;
  --color-text: #1a1d23;
  --color-text-muted: #5b6270;
  --color-primary: #4f46e5;
  --color-primary-hover: #4338ca;
  --color-accent: #0ea5e9;
  --color-danger: #dc2626;
  --color-success: #16a34a;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.06), 0 1px 3px rgba(16, 24, 40, 0.08);
  --max-width: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #0f1115;
    --color-surface: #171a21;
    --color-border: #2a2e37;
    --color-text: #e8eaed;
    --color-text-muted: #9aa1ac;
    --color-primary: #818cf8;
    --color-primary-hover: #a5b4fc;
    --color-accent: #38bdf8;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px rgba(0, 0, 0, 0.4);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 0.5em; }
p { margin: 0 0 1em; color: var(--color-text-muted); }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header / nav */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--color-text); }
.nav-toggle {
  display: inline-flex;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1.1rem;
  padding: 6px 10px;
  cursor: pointer;
  color: var(--color-text);
}
.site-nav {
  display: none;
  position: absolute;
  top: 60px;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  flex-direction: column;
  padding: 8px 20px 16px;
}
.site-nav.is-open { display: flex; }
.site-nav a { padding: 10px 0; color: var(--color-text); }

@media (min-width: 720px) {
  .nav-toggle { display: none; }
  .site-nav {
    display: flex;
    position: static;
    flex-direction: row;
    gap: 24px;
    border: none;
    padding: 0;
    background: none;
  }
  .site-nav a { padding: 0; color: var(--color-text-muted); }
  .site-nav a:hover { color: var(--color-primary); }
}

/* Hero */
.hero { padding: 48px 20px 24px; text-align: center; }
.hero h1 { font-size: clamp(1.8rem, 4vw, 2.6rem); }
.hero p { font-size: 1.1rem; }

/* Category / tool grid */
.category-section { padding: 24px 20px 8px; scroll-margin-top: 80px; }
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}
.tool-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  position: relative;
  transition: transform 0.12s ease, border-color 0.12s ease;
}
.tool-card:hover { transform: translateY(-2px); border-color: var(--color-primary); }
.tool-card.is-disabled { opacity: 0.6; cursor: default; }
.tool-card.is-disabled:hover { transform: none; border-color: var(--color-border); }
.tool-icon { font-size: 1.6rem; }
.tool-name { font-weight: 600; color: var(--color-text); }
.tool-desc { font-size: 0.88rem; color: var(--color-text-muted); }
.badge {
  position: absolute;
  top: 12px;
  right: 12px;
  font-size: 0.7rem;
  background: var(--color-border);
  color: var(--color-text-muted);
  padding: 2px 8px;
  border-radius: 999px;
}

/* Tool page shell */
.tool-page { padding: 32px 20px 8px; }
.tool-header { margin-bottom: 20px; }
.tool-icon-lg { font-size: 2.2rem; display: block; margin-bottom: 8px; }
.tool-io {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 860px) {
  .tool-io.two-col { grid-template-columns: 1fr 1fr; }
}
.field-label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.9rem;
}
textarea, input[type="text"], input[type="number"], input[type="url"],
input[type="datetime-local"], input[type="password"], select {
  width: 100%;
  font-family: inherit;
  font-size: 0.95rem;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
}
textarea {
  min-height: 220px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  resize: vertical;
}
textarea:focus, input:focus, select:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}
.toolbar { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; align-items: center; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  padding: 9px 16px;
  border-radius: var(--radius);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
.btn-secondary {
  background: transparent;
  color: var(--color-primary);
}
.btn-secondary:hover { background: rgba(79, 70, 229, 0.08); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.status-msg { font-size: 0.9rem; margin-top: 8px; }
.status-msg.error { color: var(--color-danger); }
.status-msg.success { color: var(--color-success); }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}

/* File upload / drag-drop (PDF tools) */
.dropzone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 28px 16px;
  text-align: center;
  cursor: pointer;
  background: var(--color-surface);
}
.dropzone.is-dragover { border-color: var(--color-primary); background: rgba(79, 70, 229, 0.06); }
.dropzone input[type="file"] { display: none; }
.file-list { list-style: none; padding: 0; margin: 12px 0 0; font-size: 0.9rem; }
.file-list li { padding: 6px 0; border-bottom: 1px solid var(--color-border); }

.coming-soon-panel {
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}

/* Related tools */
.related-tools { padding: 32px 20px; }
.related-list { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.related-list a {
  display: inline-flex;
  gap: 6px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.88rem;
  color: var(--color-text);
}
.related-list a:hover { border-color: var(--color-primary); }

/* Footer */
.site-footer { border-top: 1px solid var(--color-border); padding: 20px; margin-top: 32px; }
.site-footer p { font-size: 0.85rem; margin: 0; }

/* Color swatches used by color-picker / hex-rgb-converter */
.swatch { width: 100%; height: 90px; border-radius: var(--radius); border: 1px solid var(--color-border); }
.copy-row { display: flex; align-items: center; gap: 8px; }
.copy-row output, .copy-row .mono-value {
  flex: 1;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 8px 10px;
  font-size: 0.9rem;
}

mark { background: #fde68a; color: #1a1d23; border-radius: 3px; padding: 0 1px; }

/* Crop tool: drag-selectable overlay on top of the displayed image */
.crop-stage { position: relative; display: inline-block; max-width: 100%; touch-action: none; cursor: crosshair; }
.crop-stage img { display: block; max-width: 100%; height: auto; }
.crop-box { position: absolute; border: 2px dashed #fff; outline: 9999px solid rgba(0, 0, 0, 0.5); box-sizing: border-box; pointer-events: none; }