/* ===== Professional Dark Theme - Cube Network Background ===== */

/* Base Variables */
:root {
    --primary: #3b82f6;
    --secondary: #8b5cf6;
    --accent: #10b981;
    --dark: #0a0a0f;
    --darker: #050507;
    --card: #111118;
    --border: #1e1e2e;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
}

/* ===== Keyframe Animations ===== */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes cubeFloat {
    0%, 100% { 
        transform: translateY(0) rotateX(0deg) rotateY(0deg); 
    }
    25% { 
        transform: translateY(-10px) rotateX(5deg) rotateY(10deg); 
    }
    50% { 
        transform: translateY(-5px) rotateX(0deg) rotateY(20deg); 
    }
    75% { 
        transform: translateY(-15px) rotateX(-5deg) rotateY(10deg); 
    }
}

@keyframes connectionPulse {
    0%, 100% { 
        opacity: 0.15;
        stroke-dashoffset: 0;
    }
    50% { 
        opacity: 0.4;
        stroke-dashoffset: 20;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

@keyframes pulse {
    0%, 100% { 
        opacity: 1;
        transform: scale(1);
    }
    50% { 
        opacity: 0.5;
        transform: scale(1.1);
    }
}

.animate-gradient {
    background-size: 200% 200%;
    animation: gradient 3s ease infinite;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* ===== Cube Network Background ===== */
.cube-network {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.cube-network svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.network-cube {
    position: absolute;
    width: 20px;
    height: 20px;
    transform-style: preserve-3d;
    animation: cubeFloat 8s ease-in-out infinite;
}

.network-cube .face {
    position: absolute;
    width: 20px;
    height: 20px;
    border: 1px solid rgba(59, 130, 246, 0.3);
    background: rgba(59, 130, 246, 0.05);
}

.network-cube .front  { transform: translateZ(10px); }
.network-cube .back   { transform: rotateY(180deg) translateZ(10px); }
.network-cube .right  { transform: rotateY(90deg) translateZ(10px); }
.network-cube .left   { transform: rotateY(-90deg) translateZ(10px); }
.network-cube .top    { transform: rotateX(90deg) translateZ(10px); }
.network-cube .bottom { transform: rotateX(-90deg) translateZ(10px); }

.network-cube.accent .face {
    border-color: rgba(16, 185, 129, 0.3);
    background: rgba(16, 185, 129, 0.05);
}

.network-cube.secondary .face {
    border-color: rgba(139, 92, 246, 0.3);
    background: rgba(139, 92, 246, 0.05);
}

.connection-line {
    stroke: url(#lineGradient);
    stroke-width: 1;
    fill: none;
    stroke-dasharray: 5, 5;
    animation: connectionPulse 4s ease-in-out infinite;
}

/* ===== Glass Card Effect ===== */
.glass-card {
    background: rgba(17, 17, 24, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(30, 30, 46, 0.5);
}

/* ===== Scroll Animations ===== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--darker);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #2563eb, #7c3aed);
}

/* ===== Selection Color ===== */
::selection {
    background: rgba(59, 130, 246, 0.3);
    color: #fff;
}

/* ===== Loading Animation ===== */
.loading {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(59, 130, 246, 0.1);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ===== Hover Effects ===== */
.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.15);
}

/* ===== Glow Effects ===== */
.glow-primary {
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.glow-secondary {
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.3);
}

.glow-accent {
    box-shadow: 0 0 20px rgba(16, 185, 129, 0.3);
}

/* ===== Text Glow ===== */
.text-glow-primary {
    text-shadow: 0 0 20px rgba(59, 130, 246, 0.5);
}

.text-glow-secondary {
    text-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
}

/* ===== Border Gradient ===== */
.border-gradient {
    border: 1px solid transparent;
    background: linear-gradient(var(--card), var(--card)) padding-box,
                linear-gradient(135deg, var(--primary), var(--secondary)) border-box;
}

/* ===== Animated Background Gradient ===== */
.bg-animated-gradient {
    background: linear-gradient(-45deg, var(--darker), var(--dark), #0f0f1a, var(--dark));
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;
}

/* ===== Card Hover Effects ===== */
.card-hover {
    transition: all 0.3s ease;
}

.card-hover:hover {
    border-color: rgba(59, 130, 246, 0.3);
    background: rgba(17, 17, 24, 0.9);
}

/* ===== Section Divider ===== */
.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}

/* ===== Terminal Mockup ===== */
.terminal-mockup {
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
}

/* ===== Navigation Active State ===== */
.nav-link {
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

/* ===== Button Styles ===== */
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(59, 130, 246, 0.3);
}

.btn-outline {
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
}

/* ===== Form Styles ===== */
.form-input {
    background: var(--card);
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
    outline: none;
}

/* ===== Responsive Adjustments ===== */
@media (max-width: 768px) {
    .network-cube {
        width: 15px;
        height: 15px;
    }
    
    .network-cube .face {
        width: 15px;
        height: 15px;
    }
    
    .network-cube .front  { transform: translateZ(7.5px); }
    .network-cube .back   { transform: rotateY(180deg) translateZ(7.5px); }
    .network-cube .right  { transform: rotateY(90deg) translateZ(7.5px); }
    .network-cube .left   { transform: rotateY(-90deg) translateZ(7.5px); }
    .network-cube .top    { transform: rotateX(90deg) translateZ(7.5px); }
    .network-cube .bottom { transform: rotateX(-90deg) translateZ(7.5px); }
}

/* ===== Certification & Blog Card Styles ===== */
.cert-badge,
.blog-card,
.project-card {
    transition: all 0.3s ease;
}

.cert-badge:hover,
.blog-card:hover,
.project-card:hover {
    transform: translateY(-5px);
    border-color: rgba(59, 130, 246, 0.5);
}

/* ===== Social Links ===== */
.social-link {
    transition: all 0.3s ease;
}

.social-link:hover {
    transform: translateY(-3px);
    color: var(--primary);
}

/* ===== Line Clamp Utility ===== */
.line-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== Smooth Page Transitions ===== */
html {
    scroll-behavior: smooth;
}

/* ===== Gradient Text ===== */
.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}