/*
 * ToolsLab Brand Design System
 * ----------------------------
 * A comprehensive CSS library for all generated tools and main site components.
 * 
 * Version: 1.0.0
 * Font: Inter
 */

:root {
    /* Color Palette */
    --tl-primary: #6366F1;
    --tl-primary-hover: #4F46E5;
    --tl-primary-active: #4338CA;
    --tl-secondary: #8B5CF6;
    --tl-accent: #06B6D4;
    --tl-success: #10B981;
    --tl-warning: #F59E0B;
    --tl-error: #DC2626;
    
    /* Neutral Palette */
    --tl-text: #0F172A;
    --tl-text-secondary: #334155;
    --tl-text-muted: #64748B;
    --tl-bg: #F8FAFC;
    --tl-bg-card: #FFFFFF;
    --tl-border: #CBD5E1;
    --tl-border-light: #E2E8F0;
    
    /* Gradients */
    --tl-gradient-hero: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #06B6D4 100%);
    --tl-gradient-primary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    --tl-gradient-cta: linear-gradient(135deg, #6366F1 0%, #4F46E5 100%);
    
    /* Elevation & Shadows */
    --tl-shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --tl-shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --tl-shadow-lg: 0 12px 24px rgba(0,0,0,0.15);
    --tl-shadow-xl: 0 20px 40px rgba(99,102,241,0.2);
    
    /* Layout */
    --tl-radius: 8px;
    --tl-radius-lg: 12px;
    --tl-radius-xl: 16px;
    --tl-container-width: 800px;
}

/* Base resets & Typography */
.tl-body-font {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
}

/* 
 * Reusable Components
 * -------------------
 */

/* Buttons */
.tl-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--tl-radius);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: 1px solid transparent;
}

.tl-btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--tl-radius);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: 1px solid transparent;
    background: var(--tl-gradient-cta);
    color: white !important;
    box-shadow: var(--tl-shadow-md);
}

.tl-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--tl-shadow-xl);
}

.tl-btn-primary:active {
    transform: translateY(0);
}

.tl-btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--tl-radius);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: 1px solid var(--tl-border);
    background: var(--tl-bg-card);
    color: var(--tl-text-secondary) !important;
}

.tl-btn-secondary:hover {
    border-color: var(--tl-primary);
    color: var(--tl-primary) !important;
    background: var(--tl-bg);
}

/* Input Fields */
.tl-input-field {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--tl-radius);
    border: 1px solid var(--tl-border);
    background: var(--tl-bg-card);
    color: var(--tl-text);
    font-size: 1rem;
    transition: all 0.2s;
    outline: none;
}

.tl-input-field:focus {
    border-color: var(--tl-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

.tl-input-field::placeholder {
    color: var(--tl-text-muted);
}

.tl-input-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--tl-text-secondary);
    margin-bottom: 0.5rem;
}

/* Cards */
.tl-card {
    background: var(--tl-bg-card);
    border-radius: var(--tl-radius-xl);
    padding: 2rem;
    box-shadow: var(--tl-shadow-md);
    border: 1px solid var(--tl-border-light);
}

/* Result Box (for calculators, converters, etc) */
.tl-result-box {
    margin-top: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(99,102,241,0.05) 0%, rgba(139,92,246,0.05) 100%);
    border: 2px solid rgba(99,102,241,0.1);
    border-radius: var(--tl-radius-lg);
    text-align: center;
}

.tl-result-label {
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--tl-text-muted);
    margin-bottom: 0.5rem;
}

.tl-result-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--tl-primary);
    line-height: 1.1;
}

/* Grid helper */
.tl-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 640px) {
    .tl-grid-2 {
        grid-template-columns: 1fr;
    }
}