/* ==================== CSS Variables ==================== */
:root {
  --primary: #c70039;
  --primary-dark: #a0002e;
  --primary-light: #ff3355;
  --text: #333;
  --bg: #fff;
  --bg-secondary: #f5f5f5;
  --border: #eee;
  --card-bg: #fafafa;
  --card-shadow: 0 2px 10px rgba(0,0,0,0.06);
  --radius: 12px;
  --transition: 0.2s ease;
  --text-secondary: #888;
}

[data-theme="dark"] {
  --primary: #8b5cf6;
  --primary-dark: #6d3fcf;
  --primary-light: #a78bfa;
  --text: #f0f0f0;
  --bg: #0f0f0f;
  --bg-secondary: #1a1a1a;
  --border: #2a2a2a;
  --card-bg: #1a1a1a;
  --card-shadow: 0 2px 10px rgba(0,0,0,0.5);
  --text-secondary: #a0a0a0;
}

/* ==================== Reset ==================== */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ==================== Layout ==================== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* ==================== Header ==================== */
.site-header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 1.25rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.site-logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.site-logo span { font-size: 1.2rem; }
.site-nav { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.theme-toggle {
  background: none;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 0.35rem 0.55rem;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--text);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.theme-toggle:hover { background: var(--border); opacity: 0.85; }
.site-nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.9rem;
  transition: var(--transition);
  opacity: 0.8;
}
.site-nav a:hover { opacity: 1; background: var(--border); }

/* ==================== Page Body ==================== */
.page-body { padding: 2rem 0 4rem; }

/* ==================== Hero ==================== */
.hero { text-align: center; padding: 3rem 1.5rem 2rem; }
.hero h1 { font-size: 2.8rem; color: var(--primary); margin-bottom: 0.75rem; }
.hero .subtitle { font-size: 1.1rem; opacity: 0.7; margin-bottom: 1.5rem; }
.search-box { max-width: 500px; margin: 0 auto; }
#tool-search {
  width: 100%;
  padding: 0.8rem 1.1rem;
  font-size: 1rem;
  border: 2px solid var(--border);
  border-radius: var(--radius);
  background: var(--card-bg);
  color: var(--text);
  outline: none;
  transition: var(--transition);
}
#tool-search:focus { border-color: var(--primary); }

/* ==================== Category Grid ==================== */
.categories {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}
.category {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--card-shadow);
  transition: var(--transition);
}
.category:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
.category h2 {
  font-size: 1.15rem;
  color: var(--primary);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.category ul { list-style: none; }
.category li { margin: 0.5rem 0; }
.category a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  text-decoration: none;
  color: var(--text);
  padding: 0.45rem 0.5rem;
  border-radius: 6px;
  transition: var(--transition);
  gap: 0.5rem;
}
.category a:hover { background: var(--border); color: var(--primary); }
.category a .tool-name { font-weight: 500; flex-shrink: 0; }
.category a .tool-desc { font-size: 0.82rem; opacity: 0.6; text-align: right; }

/* ==================== Tool Page ==================== */
.tool-header { margin-bottom: 2rem; }
.tool-header h1 { font-size: 2rem; color: var(--primary); margin-bottom: 0.5rem; }
.tool-header .description { opacity: 0.75; font-size: 1.05rem; }

/* ==================== Tool Layout ==================== */
.tool-layout { display: grid; gap: 1.5rem; }
.tool-layout.two-col { grid-template-columns: 1fr 1fr; }
@media (max-width: 768px) { .tool-layout.two-col { grid-template-columns: 1fr; } }

.tool-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--card-shadow);
}
.tool-card h3 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.6;
  margin-bottom: 0.75rem;
}
textarea, input[type="text"], input[type="number"] {
  width: 100%;
  padding: 0.75rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 0.9rem;
  resize: none;
  outline: none;
  transition: var(--transition);
}
textarea:focus, input:focus { border-color: var(--primary); }
textarea { min-height: 200px; }

/* ==================== Buttons ==================== */
.btn-row { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1rem; }
.btn {
  padding: 0.65rem 1.4rem;
  border: none;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-secondary:hover { opacity: 0.8; }
.btn:active { transform: translateY(0); }

/* ==================== Output / Result ==================== */
.output-box {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--card-shadow);
}
.output-box h3 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  opacity: 0.6;
  margin-bottom: 0.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.output-box textarea { border-color: var(--primary); }
.copy-btn {
  font-size: 0.8rem;
  padding: 0.3rem 0.7rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  opacity: 0.85;
  transition: var(--transition);
}
.copy-btn:hover { opacity: 1; }

/* ==================== Options Row ==================== */
.options-row { display: flex; gap: 1rem; flex-wrap: wrap; align-items: center; margin-top: 0.75rem; }
.options-row label { font-size: 0.88rem; display: flex; align-items: center; gap: 0.3rem; cursor: pointer; }
.options-row input[type="checkbox"] { accent-color: var(--primary); }

/* ==================== Toast ==================== */
#toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--primary);
  color: #fff;
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: transform 0.3s ease;
  z-index: 999;
}
#toast.show { transform: translateX(-50%) translateY(0); }

/* ==================== Share Button ==================== */
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  background: var(--border);
  color: var(--text);
  border: none;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  opacity: 0.75;
}
.share-btn:hover {
  opacity: 1;
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}
.share-btn:active { transform: translateY(0); }

/* ==================== Random Tool Button ==================== */
.btn-random {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 1.2rem;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.btn-random:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}
.btn-random:active { transform: translateY(0); }

/* ==================== Footer ==================== */
.site-footer {
  text-align: center;
  padding: 2rem;
  opacity: 0.5;
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

/* ==================== Keyboard Shortcut Badge ==================== */
.kbd {
  display: inline-block;
  padding: 0.15em 0.55em;
  font-family: 'Fira Code', 'Consolas', monospace;
  font-size: 0.75em;
  line-height: 1.4;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1.5px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 2px 0 var(--border);
  font-weight: 500;
  vertical-align: middle;
  user-select: none;
}
.kbd-row {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 0.6rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  opacity: 0.7;
}
.site-footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ==================== SVG Icon Classes ==================== */
.nav-icon { width: 1.1rem; height: 1.1rem; vertical-align: middle; }
.nav-icon-link { display: inline-flex !important; align-items: center; gap: 0.1rem; }
.nav-icon-link span { font-size: 0.9rem; }
.btn-icon { width: 1.1rem; height: 1.1rem; vertical-align: middle; margin-right: 0.3rem; }
.share-icon { width: 1rem; height: 1rem; vertical-align: middle; margin-right: 0.25rem; }