/* Apex Tools Modern Utility Suite CSS */
:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --accent: #0284c7;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --border-focus: #818cf8;
  --success: #10b981;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  font-family: var(--font);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.15s;
}
a:hover {
  color: var(--primary-hover);
}

/* Header */
.site-header {
  background: #ffffff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.875rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
}
.site-logo img, .site-logo svg {
  width: 32px;
  height: 32px;
}
.site-logo span {
  background: linear-gradient(135deg, #4f46e5, #0284c7);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-muted);
}
.nav-link:hover, .nav-link.active {
  color: var(--primary);
}

/* Layout */
.main-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
  flex: 1;
  width: 100%;
}

.two-col-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 900px) {
  .two-col-layout {
    grid-template-columns: 1fr;
  }
}

/* Hero Section */
.hero-banner {
  text-align: center;
  margin-bottom: 2.5rem;
  padding: 2rem 1rem;
  background: linear-gradient(180deg, #ffffff 0%, rgba(248, 250, 252, 0) 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}
.hero-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: #0f172a;
  margin-bottom: 0.75rem;
}
.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto 1.5rem;
}

/* Search & Filter Bar */
.search-filter-box {
  max-width: 540px;
  margin: 0 auto;
  position: relative;
}
.search-input {
  width: 100%;
  padding: 0.875rem 1.25rem 0.875rem 2.75rem;
  font-size: 1rem;
  border-radius: 9999px;
  border: 1px solid var(--border);
  background: #ffffff;
  outline: none;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}
.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}
.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* Category Filter Tabs */
.category-tabs {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}
.category-tab {
  padding: 0.4rem 1rem;
  border-radius: 9999px;
  font-size: 0.875rem;
  font-weight: 500;
  background: #ffffff;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s;
}
.category-tab:hover, .category-tab.active {
  background: var(--primary);
  color: #ffffff;
  border-color: var(--primary);
}

/* Tool Grid Cards */
.tools-section {
  margin-bottom: 3rem;
}
.section-heading {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}
.tool-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all 0.2s ease-in-out;
  display: flex;
  flex-direction: column;
  position: relative;
  box-shadow: var(--shadow-sm);
}
.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}
.tool-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}
.tool-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}
.tool-card-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  flex: 1;
}
.tool-card-action {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

/* Tool Workspace Container */
.tool-container {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
}
.tool-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.25rem;
  margin-bottom: 1.75rem;
}
.tool-title {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.5rem;
}
.tool-desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* Forms & Inputs */
.form-group {
  margin-bottom: 1.25rem;
}
.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: #334155;
}
.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text-main);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}
textarea.form-control {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.875rem;
  min-height: 160px;
  resize: vertical;
}

.input-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--primary);
  color: #ffffff;
  padding: 0.75rem 1.5rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
}
.btn-primary:hover {
  background: var(--primary-hover);
}
.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: #f1f5f9;
  color: #334155;
  padding: 0.75rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.15s;
}
.btn-secondary:hover {
  background: #e2e8f0;
}

/* Result Box */
.result-card {
  background: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-top: 1.5rem;
}
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}
.result-item {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1rem;
}
.result-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-bottom: 0.25rem;
}
.result-val {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

/* Footer */
.site-footer {
  background: #ffffff;
  border-top: 1px solid var(--border);
  padding: 2.5rem 1.25rem;
  margin-top: auto;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.footer-links {
  display: flex;
  gap: 1.25rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.footer-copy {
  font-size: 0.875rem;
  color: var(--text-muted);
}