/* Bold Utility Design System */
:root {
    /* Colors */
    --bg-primary: #101010;
    /* Deep Matte Black */
    --bg-secondary: #18181b;
    /* Slightly lighter for cards */
    --bg-tertiary: #27272a;
    /* Borders/Separators */

    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-tertiary: #52525b;

    --accent-primary: #3B82F6;
    /* Electric Blue */
    --accent-secondary: #FACC15;
    /* Vibrant Yellow */
    --accent-tertiary: #EC4899;
    /* Hot Pink */
    --accent-quaternary: #14B8A6;
    /* Teal */

    --border-color: #27272a;
    --border-focus: #3B82F6;

    /* Typography */
    --font-sans: 'Inter', 'Work Sans', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Mono', monospace;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --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);
    --shadow-glow-blue: 0 0 15px rgba(59, 130, 246, 0.3);
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-sans);
    margin: 0;
    padding: 0;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Typography Utilities */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    margin-top: 0;
    color: var(--text-primary);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--accent-secondary);
}

/* Layout Utilities */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(8px);
    background: rgba(16, 16, 16, 0.8);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    background: linear-gradient(135deg, var(--accent-primary), #2563EB);
    color: white;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.logo-container:hover .logo-icon {
    transform: rotate(-5deg) scale(1.05);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.5);
}

.logo-text {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    display: flex;
    align-items: baseline;
}

.logo-highlight {
    color: var(--accent-primary);
    margin-left: 2px;
}

.logo-dot {
    color: var(--accent-secondary);
    font-size: 1.5em;
    line-height: 0;
    margin-left: 2px;
    animation: blink 2s infinite;
}

@keyframes blink {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* Navigation */
.main-nav {
    display: flex;
    gap: var(--spacing-md);
}

.main-nav a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.main-nav a:hover {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

.main-nav a.active {
    color: var(--accent-primary);
    background-color: rgba(59, 130, 246, 0.1);
    font-weight: 700;
}

/* Tool Cards (Bento Grid) */
.tool-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-xl) 0;
}

.tool-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    /* Default accent if no theme class */
    --card-accent: var(--accent-primary);
}

/* Theme Classes */
.theme-blue {
    --card-accent: var(--accent-primary);
}

.theme-yellow {
    --card-accent: var(--accent-secondary);
}

.theme-pink {
    --card-accent: var(--accent-tertiary);
}

.theme-teal {
    --card-accent: var(--accent-quaternary);
}

.tool-card:hover {
    transform: translateY(-6px);
    border-color: var(--card-accent);
    box-shadow: 0 12px 24px -8px rgba(0, 0, 0, 0.3),
        0 0 0 1px var(--card-accent);
    background-color: #1f1f23;
    /* Slightly lighter on hover */
}

/* Top colored line */
.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--card-accent);
    opacity: 0.7;
    transition: height 0.2s ease, opacity 0.2s ease;
}

.tool-card:hover::before {
    height: 6px;
    opacity: 1;
}


.tool-card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-md);
    color: var(--card-accent);
    background: rgba(255, 255, 255, 0.03);
    padding: 12px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease, transform 0.3s ease;
}

.tool-card:hover .tool-card-icon {
    background: rgba(255, 255, 255, 0.08);
    transform: scale(1.05);
}

.tool-card-icon svg {
    width: 100%;
    height: 100%;
    stroke-width: 2;
}

.tool-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.tool-card-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Footer */
footer {
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    margin-top: auto;
    text-align: center;
    color: var(--text-tertiary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-family: var(--font-sans);
}

.btn-primary {
    background-color: var(--accent-primary);
    color: white;
}

.btn-primary:hover {
    background-color: #2563EB;
    /* Darker blue */
    transform: translateY(-1px);
}

/* Inputs */
input,
select,
textarea {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    transition: border-color 0.2s ease;
    width: 100%;
    box-sizing: border-box;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}