:root {
    /* Color Palette - Enterprise/SaaS Minimal (Slate + Royal Blue) */

    /* Neutrals */
    --white: #ffffff;
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    --slate-950: #020617;

    /* Semantic Mappings */
    --background: var(--white);
    --surface: var(--white);
    --surface-hover: var(--slate-50);

    --text-primary: var(--slate-900);
    --text-secondary: var(--slate-500);
    --text-tertiary: var(--slate-400);

    --border: var(--slate-200);
    --border-hover: var(--slate-300);

    /* Primary Brand: Trustworthy Royal Blue */
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    /* blue-50 */
    --primary-border: #bfdbfe;
    /* blue-200 */

    /* Typography */
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: 'Roboto Mono', 'SFMono-Regular', Consolas, "Liberation Mono", Menlo, monospace;

    /* Spacing & Radii */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-full: 9999px;

    /* Shadows (Subtle) */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    --transition: all 0.2s ease-in-out;
}

@media (prefers-color-scheme: dark) {
    :root {
        --background: var(--slate-950);
        --surface: var(--slate-900);
        --surface-hover: var(--slate-800);

        --text-primary: var(--slate-50);
        --text-secondary: var(--slate-400);
        --text-tertiary: var(--slate-500);

        --border: var(--slate-800);
        --border-hover: var(--slate-700);

        --primary: #3b82f6;
        --primary-hover: #60a5fa;
        --primary-light: rgba(59, 130, 246, 0.1);
        --primary-border: rgba(59, 130, 246, 0.2);
    }
}

/* Global Reset */
html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-heading);
    background-color: var(--slate-50);
    /* Subtle background for contrast */
    color: var(--text-primary);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: var(--slate-950);
    }
}

/* Layout */
.container {
    max-width: 1100px;
    /* Slightly wider for modern feel */
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* Header */
header {
    background: rgba(255, 255, 255, 0.9);
    border-bottom: 1px solid var(--border);
    height: 72px;
    /* Taller header */
    display: flex;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

@media (prefers-color-scheme: dark) {
    header {
        background-color: rgba(2, 6, 23, 0.9);
    }
}

.brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand svg {
    color: var(--primary);
}

/* Hero Section */
.hero-section {
    padding: 80px 0 60px;
    text-align: center;
    background-image: radial-gradient(var(--slate-200) 1px, transparent 1px);
    background-size: 40px 40px;
    margin-bottom: 40px;
}

@media (prefers-color-scheme: dark) {
    .hero-section {
        background-image: radial-gradient(var(--slate-800) 1px, transparent 1px);
    }
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--slate-500) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@media (prefers-color-scheme: dark) {
    .hero-title {
        background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 48px;
    font-weight: 400;
}

/* Tools Grid */
.tools-directory {
    padding: 40px 0 80px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

/* Home Page Specific Grid Card */
.tool-grid-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-decoration: none;
    transition: all 0.2s ease-in-out;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tool-grid-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    background: var(--surface-hover);
}

/* Tool Card (Input Area) specific enhancements */
.tool-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    /* Denser padding for inputs */
    box-shadow: var(--shadow-md);
    margin-bottom: 32px;
}

/* Form Styles */
.form-group {
    margin-bottom: 24px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
}

input[type="text"],
input[type="number"],
input[type="date"],
input[type="email"],
select,
textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    appearance: none;
    /* Remove default browser styling */
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-light);
    outline: none;
}

/* Buttons */
.cyber-btn,
button[type="submit"] {
    background-color: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
    /* Full width on mobile/default */
    text-align: center;
    margin-top: 10px;
}

.cyber-btn:hover,
button[type="submit"]:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Golden Snippet Refinement */
.golden-snippet {
    background: var(--primary-light);
    border: 1px solid var(--primary-border);
    border-left: 4px solid var(--primary);
    border-radius: 12px;
    padding: 24px 32px;
    margin-bottom: 40px;
}

.golden-snippet h2 {
    color: var(--primary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 12px;
}

.golden-snippet p {
    font-size: 1.25rem;
    font-weight: 500;
    line-height: 1.6;
    color: var(--slate-800);
    margin: 0;
}

@media (prefers-color-scheme: dark) {
    .golden-snippet p {
        color: var(--slate-200);
    }
}

/* Logic Table Styling */
.logic-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin: 24px 0;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}

.logic-table th {
    background: var(--slate-50);
    text-align: left;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
}

@media (prefers-color-scheme: dark) {
    .logic-table th {
        background: var(--slate-800);
    }
}

.logic-table td {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

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

/* Social Share Components */
.share-container {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

.share-label {
    display: block;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.share-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.share-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    cursor: pointer;
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.share-btn svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

/* Brand Colors */
.share-btn.twitter {
    background-color: #000000;
}

.share-btn.facebook {
    background-color: #1877F2;
}

.share-btn.linkedin {
    background-color: #0A66C2;
}

.share-btn.whatsapp {
    background-color: #25D366;
}

@media (prefers-color-scheme: dark) {
    .share-btn.twitter {
        background-color: #ffffff;
        color: black;
    }
}

/* Skeleton Loading State */
.skeleton-wrapper {
    display: contents;
}

.skeleton {
    background: #e2e8f0;
    background: linear-gradient(90deg,
            var(--slate-100) 25%,
            var(--slate-200) 50%,
            var(--slate-100) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite linear;
    border-radius: var(--radius-sm);
    display: inline-block;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

@media (prefers-color-scheme: dark) {
    .skeleton {
        background: var(--slate-800);
        background: linear-gradient(90deg,
                var(--slate-800) 25%,
                var(--slate-700) 50%,
                var(--slate-800) 75%);
    }
}

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
    width: 100%;
}

.skeleton-title {
    height: 1.5em;
    margin-bottom: 0.75em;
    width: 60%;
}

.skeleton-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}