/* ============================================================
   GLOBAL.CSS — QuickDevUtils.com
   Variables, reset, base styles, utilities, dark mode
   ============================================================ */

/* ---- CSS Custom Properties ---- */
:root {
  /* Colors — Light Mode */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --border: #e2e8f0;
  --input-bg: #f8fafc;
  --code-bg: #1e2937;
  --code-text: #e2e8f0;
  --success: #10b981;
  --error: #ef4444;
  --warning: #f59e0b;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: "Fira Code", "Cascadia Code", Consolas, "Courier New", monospace;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 48px;

  /* Radius */
  --radius: 8px;
  --radius-lg: 12px;
  --radius-sm: 4px;

  /* Transitions */
  --transition: 0.15s ease;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --border: #334155;
  --input-bg: #1e293b;
  --shadow: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.4);
}

/* ---- Box Sizing Reset ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ---- Base ---- */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  transition: background-color var(--transition), color var(--transition);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* ---- Typography ---- */
h1 { font-size: 1.75rem; font-weight: 700; line-height: 1.2; margin-bottom: var(--spacing-sm); }
h2 { font-size: 1.375rem; font-weight: 600; line-height: 1.3; margin-bottom: var(--spacing-sm); }
h3 { font-size: 1.125rem; font-weight: 600; line-height: 1.4; margin-bottom: var(--spacing-xs); }
p  { margin-bottom: var(--spacing-md); color: var(--text-secondary); }
p:last-child { margin-bottom: 0; }

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

ul, ol { padding-left: 1.5rem; margin-bottom: var(--spacing-md); }
li { margin-bottom: var(--spacing-xs); color: var(--text-secondary); }

@media (min-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: 0.625rem var(--spacing-md);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), transform 0.1s ease, box-shadow var(--transition);
  min-height: 44px;
  white-space: nowrap;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn:active { transform: scale(0.98); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

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

.btn-secondary {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background-color: var(--border); }

.btn-ghost {
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-ghost:hover { background-color: var(--bg-secondary); color: var(--text-primary); }

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

/* ---- Copy Button ---- */
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 500;
  background-color: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  min-height: 32px;
  font-family: var(--font-sans);
}
.copy-btn:hover { background-color: var(--accent); color: #fff; border-color: var(--accent); }
.copy-btn.copied { background-color: var(--success); color: #fff; border-color: var(--success); }

/* ---- Badges ---- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 999px;
  gap: var(--spacing-xs);
}
.badge-success { background-color: rgba(16, 185, 129, 0.15); color: #059669; }
.badge-error   { background-color: rgba(239, 68, 68, 0.15); color: #dc2626; }
.badge-info    { background-color: rgba(37, 99, 235, 0.15); color: var(--accent); }
.badge-warning { background-color: rgba(245, 158, 11, 0.15); color: #d97706; }

[data-theme="dark"] .badge-success { color: #34d399; }
[data-theme="dark"] .badge-error   { color: #f87171; }
[data-theme="dark"] .badge-info    { color: #60a5fa; }
[data-theme="dark"] .badge-warning { color: #fbbf24; }

/* ---- Form Elements ---- */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="tel"],
input[type="date"],
input[type="datetime-local"],
select,
textarea {
  width: 100%;
  padding: 0.625rem var(--spacing-sm);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--text-primary);
  background-color: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  -webkit-appearance: none;
  min-height: 44px;
}

textarea {
  resize: vertical;
  line-height: 1.5;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  min-height: 180px;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23475569' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}

input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  margin: 0;
  cursor: pointer;
  accent-color: var(--accent);
  min-height: auto;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}
.checkbox-group label { margin: 0; cursor: pointer; }

/* ---- Ad Slots ---- */
.ad-slot {
  background-color: var(--bg-tertiary);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.75rem;
  overflow: hidden;
}
.ad-top    { min-height: 90px; width: 100%; margin-bottom: var(--spacing-lg); }
.ad-mid    { min-height: 280px; width: 100%; margin: var(--spacing-lg) 0; }
.ad-sidebar { min-height: 250px; width: 100%; }

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
  .container { padding: 0 var(--spacing-lg); }
}

/* ---- Accessibility ---- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ---- Utility ---- */
.text-success { color: var(--success); }
.text-error   { color: var(--error); }
.text-muted   { color: var(--text-secondary); }
.text-mono    { font-family: var(--font-mono); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.hidden { display: none !important; }

/* Reserve header space before JS upgrades the web component */
site-header:not(:defined) {
  display: block;
  height: 60px;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border);
}