/* Vserviz Website - Custom CSS Styles
 * Extends and overrides Tailwind CSS CDN classes
 * Version: 2.0
 * Date: 2026-03-24
 */

/* ==========================================================================
   CSS Custom Properties (Design Tokens)
   ========================================================================== */
:root {
    /* Primary gradient - dark blue theme */
    --gradient-primary: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    
    /* Accent gradient - cyan to blue */
    --gradient-accent: linear-gradient(90deg, #06b6d4 0%, #3b82f6 100%);
    
    /* Solid color equivalents */
    --color-primary: #0f172a;
    --color-primary-light: #1e293b;
    --color-accent: #06b6d4;
    --color-accent-secondary: #3b82f6;
    
    /* Text colors */
    --color-text-primary: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #94a3b8;
    
    /* Border colors */
    --color-border: #334155;
    --color-border-light: #475569;
    
    /* Success/Error states */
    --color-success: #10b981;
    --color-error: #ef4444;
    --color-warning: #f59e0b;
}

/* ==========================================================================
   Custom Utility Classes
   ========================================================================== */

/* Gradient backgrounds */
.gradient-bg {
    background: var(--gradient-primary);
}

.gradient-accent {
    background: var(--gradient-accent);
}

.gradient-accent-text {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

/* Card styling */
.card {
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid var(--color-border);
    border-radius: 0.75rem;
    transition: all 0.3s ease;
}

.card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(6, 182, 212, 0.1);
}

/* Service category cards */
.service-category {
    background: rgba(15, 23, 42, 0.7);
    border-left: 4px solid var(--color-accent);
}

/* Partner service indicator */
.partner-service {
    position: relative;
}

.partner-service::before {
    content: "Partner-Delivered";
    position: absolute;
    top: -0.75rem;
    right: 1rem;
    background: var(--color-accent);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    z-index: 10;
}

/* Case study cards */
.case-study-card {
    background: linear-gradient(145deg, rgba(15, 23, 42, 0.9), rgba(30, 41, 59, 0.9));
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.case-study-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-accent);
}

/* Form styling */
.form-input {
    background: rgba(30, 41, 59, 0.7);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    transition: all 0.2s ease;
}

.form-input:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.1);
    outline: none;
}

.form-input-error {
    border-color: var(--color-error) !important;
}

/* Button enhancements */
.btn-primary {
    background: var(--gradient-accent);
    color: white;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 25px -5px rgba(6, 182, 212, 0.4);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: rgba(6, 182, 212, 0.1);
}

/* Expertise grid items */
.expertise-item {
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.expertise-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.expertise-item:hover::after {
    transform: scaleX(1);
}

/* Platform logo container */
.platform-logos {
    filter: grayscale(100%);
    opacity: 0.7;
    transition: all 0.3s ease;
}

.platform-logos:hover {
    filter: grayscale(0%);
    opacity: 1;
}

/* Database expertise badges */
.database-badge {
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid var(--color-border-light);
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.database-badge:hover {
    border-color: var(--color-accent);
    transform: translateY(-1px);
}

/* ==========================================================================
   Accessibility Improvements
   ========================================================================== */

/* Reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .card,
    .btn-primary,
    .btn-secondary,
    .expertise-item,
    .database-badge {
        transition: none !important;
        transform: none !important;
    }
}

/* Focus styles for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 0.25rem;
}

/* Skip link visible on focus */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: 0.5rem 1rem;
    z-index: 1000;
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .card {
        border: 2px solid var(--color-border);
    }
    
    .form-input {
        border: 2px solid var(--color-border);
    }
    
    .btn-primary,
    .btn-secondary {
        border: 2px solid currentColor;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
    .no-print {
        display: none !important;
    }
    
    body {
        background: white !important;
        color: black !important;
        font-size: 12pt !important;
        line-height: 1.5 !important;
    }
    
    .gradient-bg,
    .gradient-accent,
    .card,
    .case-study-card {
        background: white !important;
        border: 1px solid #ddd !important;
        box-shadow: none !important;
    }
    
    .gradient-accent-text {
        background: none !important;
        color: black !important;
        -webkit-background-clip: initial !important;
        background-clip: initial !important;
    }
    
    a {
        color: black !important;
        text-decoration: underline !important;
    }
    
    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 10pt;
        color: #666;
    }
    
    .btn-primary,
    .btn-secondary {
        background: white !important;
        color: black !important;
        border: 1px solid #ddd !important;
    }
    
    /* Hide decorative elements */
    .platform-logos,
    .database-badge,
    .partner-service::before,
    .case-study-card::before,
    .expertise-item::after {
        display: none !important;
    }
    
    /* Ensure good contrast for printed text */
    h1, h2, h3, h4, h5, h6 {
        color: black !important;
        page-break-after: avoid;
    }
    
    /* Avoid page breaks inside important content */
    .case-study-card,
    .service-category {
        page-break-inside: avoid;
    }
    
    /* Add URL for external links */
    .footer a[href^="http"]::after {
        content: " (" attr(href) ")";
    }
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */

/* Large screens (≥ 1280px) */
@media (min-width: 1280px) {
    .container {
        max-width: 1280px;
    }
}

/* Medium screens (≥ 768px) adjustments */
@media (min-width: 768px) {
    .service-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .expertise-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

/* Small screens (≤ 640px) adjustments */
@media (max-width: 640px) {
    .card,
    .case-study-card {
        border-radius: 0.5rem;
    }
    
    .partner-service::before {
        font-size: 0.625rem;
        padding: 0.125rem 0.5rem;
        top: -0.5rem;
    }
    
    .database-badge {
        padding: 0.375rem 0.75rem;
        font-size: 0.875rem;
    }
}

/* ==========================================================================
   Animation Keyframes
   ========================================================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-20px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Apply animations only if user doesn't prefer reduced motion */
@media (prefers-reduced-motion: no-preference) {
    .fade-in {
        animation: fadeIn 0.6s ease-out;
    }
    
    .slide-in {
        animation: slideIn 0.5s ease-out;
    }
}

/* ==========================================================================
   Helper Classes
   ========================================================================== */

/* Text utilities */
.text-balance {
    text-wrap: balance;
}

/* Spacing utilities */
.section-padding {
    padding-top: 4rem;
    padding-bottom: 4rem;
}

@media (max-width: 768px) {
    .section-padding {
        padding-top: 3rem;
        padding-bottom: 3rem;
    }
}

/* Border utilities */
.border-gradient {
    border: 2px solid transparent;
    background: linear-gradient(var(--color-primary), var(--color-primary)) padding-box,
                var(--gradient-accent) border-box;
}

/* Shadow utilities */
.shadow-glow {
    box-shadow: 0 0 20px rgba(6, 182, 212, 0.15);
}

/* ==========================================================================
   Form-specific styles
   ========================================================================== */

/* Form validation styles */
.form-error {
    color: var(--color-error);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: none;
}

.form-input:invalid:not(:focus):not(:placeholder-shown) + .form-error {
    display: block;
}

/* Loading state for form submission */
.form-loading {
    position: relative;
    pointer-events: none;
    opacity: 0.7;
}

.form-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1.25rem;
    height: 1.25rem;
    margin: -0.625rem 0 0 -0.625rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: form-spinner 0.6s linear infinite;
}

@keyframes form-spinner {
    to {
        transform: rotate(360deg);
    }
}

/* ==========================================================================
   Custom scrollbar (optional enhancement)
   ========================================================================== */
@media (min-width: 768px) {
    ::-webkit-scrollbar {
        width: 10px;
    }
    
    ::-webkit-scrollbar-track {
        background: var(--color-primary);
    }
    
    ::-webkit-scrollbar-thumb {
        background: var(--color-border);
        border-radius: 5px;
    }
    
    ::-webkit-scrollbar-thumb:hover {
        background: var(--color-accent);
    }
}