/* ===================================
   Custom Properties & Variables
   =================================== */
:root {
    /* Colors - Dark Theme */
    --color-dark: #0a0e1a;
    --color-dark-lighter: #131824;
    --color-dark-card: #1a1f2e;
    --color-light: #e4e8f0;
    --color-gray: #9ca3af;
    --color-cyan: #06b6d4;
    --color-cyan-dark: #0891b2;
    --color-purple: #a855f7;
    --color-purple-dark: #9333ea;
    --color-green: #10b981;
    --color-red: #ef4444;
    
    /* Light Theme Colors */
    --color-light-bg: #f8fafc;
    --color-light-card: #ffffff;
    --color-light-text: #1e293b;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-cyan), var(--color-purple));
    --gradient-secondary: linear-gradient(135deg, var(--color-purple), #ec4899);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --shadow-glow-cyan: 0 0 20px rgba(6, 182, 212, 0.3);
    --shadow-glow-purple: 0 0 20px rgba(168, 85, 247, 0.3);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* Light Theme */
.light-theme {
    --color-dark: #f8fafc;
    --color-dark-lighter: #f1f5f9;
    --color-dark-card: #ffffff;
    --color-light: #1e293b;
    --color-gray: #64748b;
}

/* ===================================
   Base Styles
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--color-dark);
    color: var(--color-light);
    line-height: 1.6;
    overflow-x: hidden;
}

.font-inter {
    font-family: 'Inter', sans-serif;
}

.font-mono {
    font-family: 'JetBrains Mono', 'Courier New', monospace;
}

/* ===================================
   Custom Tailwind Extensions
   =================================== */
.bg-dark {
    background-color: var(--color-dark);
}

.text-light {
    color: var(--color-light);
}

/* ===================================
   Typography
   =================================== */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-gray);
    font-weight: 500;
}

/* ===================================
   Navigation
   =================================== */
.nav-link {
    position: relative;
    color: var(--color-light);
    font-weight: 500;
    transition: color var(--transition-fast);
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}

.nav-link:hover {
    color: var(--color-cyan);
}

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

.nav-link-mobile {
    color: var(--color-light);
    font-weight: 500;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    transition: all var(--transition-fast);
}

.nav-link-mobile:hover {
    background-color: rgba(6, 182, 212, 0.1);
    color: var(--color-cyan);
}

/* ===================================
   Buttons
   =================================== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    background: var(--gradient-primary);
    color: white;
    font-weight: 600;
    border-radius: 0.75rem;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-glow-cyan);
    border: none;
    cursor: pointer;
    text-decoration: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(6, 182, 212, 0.5);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    background-color: rgba(6, 182, 212, 0.1);
    color: var(--color-cyan);
    font-weight: 600;
    border-radius: 0.75rem;
    border: 2px solid rgba(6, 182, 212, 0.3);
    transition: all var(--transition-normal);
    cursor: pointer;
    text-decoration: none;
}

.btn-secondary:hover {
    background-color: rgba(6, 182, 212, 0.2);
    border-color: var(--color-cyan);
    transform: translateY(-2px);
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background-color: rgba(6, 182, 212, 0.2);
    color: var(--color-cyan);
    border-radius: 0.5rem;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-icon:hover {
    background-color: var(--color-cyan);
    color: white;
    transform: scale(1.1);
}

/* ===================================
   Cards
   =================================== */
.card {
    background-color: var(--color-dark-card);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 1rem;
    padding: 2rem;
    transition: all var(--transition-normal);
}

.card:hover {
    border-color: rgba(6, 182, 212, 0.4);
    box-shadow: var(--shadow-glow-cyan);
    transform: translateY(-4px);
}

.stat-card {
    background-color: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 0.75rem;
    padding: 1.5rem;
    text-align: center;
    transition: all var(--transition-normal);
}

.stat-card:hover {
    background-color: rgba(6, 182, 212, 0.15);
    border-color: var(--color-cyan);
    transform: translateY(-2px);
}

/* ===================================
   Project Cards
   =================================== */
.project-card {
    background-color: var(--color-dark-card);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 1rem;
    overflow: hidden;
    transition: all var(--transition-normal);
}

.project-card:hover {
    border-color: rgba(6, 182, 212, 0.4);
    box-shadow: var(--shadow-glow-cyan);
    transform: translateY(-8px);
}

.project-image {
    position: relative;
    overflow: hidden;
}

.project-overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(6, 182, 212, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

/* ===================================
   Skills
   =================================== */
.skill-category {
    background-color: rgba(6, 182, 212, 0.05);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 0.75rem;
    padding: 1.5rem;
}

.skill-category-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-light);
    margin-bottom: 1rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    padding: 0.5rem 1rem;
    background-color: rgba(6, 182, 212, 0.1);
    color: var(--color-cyan);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    background-color: rgba(6, 182, 212, 0.2);
    border-color: var(--color-cyan);
    transform: translateY(-2px);
}

/* ===================================
   Tags
   =================================== */
.tag {
    padding: 0.375rem 0.75rem;
    background-color: rgba(168, 85, 247, 0.1);
    color: var(--color-purple);
    border: 1px solid rgba(168, 85, 247, 0.3);
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===================================
   Feature Cards
   =================================== */
.feature-card {
    background-color: var(--color-dark-card);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    border-color: rgba(6, 182, 212, 0.4);
    box-shadow: var(--shadow-glow-cyan);
    transform: translateY(-4px);
}

/* ===================================
   Game Items
   =================================== */
.game-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background-color: rgba(6, 182, 212, 0.05);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 0.75rem;
    transition: all var(--transition-fast);
}

.game-item:hover {
    background-color: rgba(6, 182, 212, 0.1);
    border-color: rgba(6, 182, 212, 0.4);
    transform: translateX(4px);
}

/* ===================================
   FAQ
   =================================== */
.faq-item {
    background-color: var(--color-dark-card);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 0.75rem;
    overflow: hidden;
    transition: all var(--transition-fast);
}

.faq-item:hover {
    border-color: rgba(6, 182, 212, 0.4);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    background: transparent;
    border: none;
    color: var(--color-light);
    font-size: 1.125rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.faq-question:hover {
    color: var(--color-cyan);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--color-gray);
    line-height: 1.8;
}

/* ===================================
   Forms
   =================================== */
.form-label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--color-light);
    font-weight: 500;
    font-size: 0.875rem;
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background-color: rgba(6, 182, 212, 0.05);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 0.5rem;
    color: var(--color-light);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

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

.form-input::placeholder {
    color: var(--color-gray);
}

/* ===================================
   Contact Links
   =================================== */
.contact-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background-color: rgba(6, 182, 212, 0.05);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 0.5rem;
    color: var(--color-light);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.contact-link:hover {
    background-color: rgba(6, 182, 212, 0.1);
    border-color: var(--color-cyan);
    color: var(--color-cyan);
    transform: translateX(4px);
}

/* ===================================
   Footer
   =================================== */
.footer-link {
    color: var(--color-gray);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-cyan);
}

.social-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background-color: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
    border-radius: 0.5rem;
    color: var(--color-cyan);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.social-icon:hover {
    background-color: var(--color-cyan);
    border-color: var(--color-cyan);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-cyan);
}

/* ===================================
   Animations & Effects
   =================================== */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 20px rgba(6, 182, 212, 0.3);
    }
    50% {
        box-shadow: 0 0 40px rgba(6, 182, 212, 0.6);
    }
}

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

/* Gradient Orbs */
.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: float 8s ease-in-out infinite;
}

.gradient-orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-cyan), transparent);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.gradient-orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--color-purple), transparent);
    bottom: 10%;
    right: 10%;
    animation-delay: 2s;
}

/* Code Rain Effect */
.code-rain {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(6, 182, 212, 0.03) 2px,
            rgba(6, 182, 212, 0.03) 4px
        );
    opacity: 0.5;
}

/* Typing Animation */
.typing-text::after {
    content: '|';
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}

/* Scroll Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all var(--transition-slow);
}

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

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .section-title {
        font-size: 2rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .gradient-orb {
        width: 300px;
        height: 300px;
    }
}

@media (max-width: 640px) {
    .section-title {
        font-size: 1.75rem;
    }
    
    .btn-primary,
    .btn-secondary {
        padding: 0.75rem 1.5rem;
        font-size: 0.875rem;
    }
}

/* ===================================
   Utility Classes
   =================================== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.text-center {
    text-align: center;
}

.relative {
    position: relative;
}

.absolute {
    position: absolute;
}

.overflow-hidden {
    overflow: hidden;
}

/* ===================================
   Custom Scrollbar
   =================================== */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: var(--color-dark-lighter);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--color-cyan), var(--color-purple));
    border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--color-cyan-dark), var(--color-purple-dark));
}

/* ===================================
   Selection
   =================================== */
::selection {
    background-color: rgba(6, 182, 212, 0.3);
    color: var(--color-light);
}

::-moz-selection {
    background-color: rgba(6, 182, 212, 0.3);
    color: var(--color-light);
}

/* ===================================
   Print Styles
   =================================== */
@media print {
    .no-print {
        display: none !important;
    }
}