/* =============================================
   MODERN GLOBAL STYLES - Kaustav Maity Portfolio
   Dark theme with animations and modern design
   ============================================= */

:root {
    /* Dark Theme Colors */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: rgba(30, 41, 59, 0.8);
    
    /* Accent Colors */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-tertiary: #06b6d4;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    /* Status Colors */
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    /* Borders & Shadows */
    --border-color: rgba(99, 102, 241, 0.2);
    --glow-primary: 0 0 20px rgba(99, 102, 241, 0.3);
    --shadow-lg: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

/* ===== ANIMATED NAVBAR ===== */
.navbar-modern {
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    transition: all var(--transition-normal);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar-modern.scrolled {
    padding: 0.5rem 0;
    box-shadow: var(--shadow-lg);
}

.navbar-brand-modern {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.5rem;
}

.brand-icon {
    width: 45px;
    height: 45px;
    background: var(--accent-gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    position: relative;
    overflow: hidden;
}

.brand-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
    transform: rotate(45deg);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%) rotate(45deg); }
    100% { transform: translateX(100%) rotate(45deg); }
}

.brand-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link-modern {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.6rem 1.1rem;
    border-radius: 10px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.nav-link-modern::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.nav-link-modern:hover {
    color: var(--text-primary);
    background: rgba(99, 102, 241, 0.1);
}

.nav-link-modern:hover::before {
    width: 60%;
}

.nav-link-modern.active {
    color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.15);
}

.nav-link-modern.active::before {
    width: 60%;
}

.nav-cta {
    background: var(--accent-gradient);
    color: white !important;
    padding: 0.6rem 1.25rem;
    border-radius: 10px;
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

.nav-cta::before {
    display: none;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* Main Content Spacing */
main {
    padding-top: 80px;
    min-height: calc(100vh - 400px);
}

/* ===== ANIMATED FOOTER ===== */
.footer-modern {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    padding: 5rem 0 2rem;
    position: relative;
    overflow: hidden;
    margin-top: 0;
}

.footer-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--accent-gradient);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.footer-brand .brand-icon {
    width: 50px;
    height: 50px;
}

.footer-brand .brand-text {
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.footer-title {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.75rem;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--accent-gradient);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-links a:hover {
    color: var(--accent-primary);
    transform: translateX(5px);
}

.footer-links a i {
    font-size: 0.8rem;
    opacity: 0;
    transition: all var(--transition-normal);
}

.footer-links a:hover i {
    opacity: 1;
}

/* Social Links */
.social-links-modern {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-link {
    width: 45px;
    height: 45px;
    border-radius: 12px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.social-link:hover {
    background: var(--accent-gradient);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--glow-primary);
}

/* Newsletter */
.newsletter-form {
    display: flex;
    gap: 0.5rem;
}

.newsletter-input {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.newsletter-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

.newsletter-btn {
    background: var(--accent-gradient);
    border: none;
    border-radius: 10px;
    padding: 0.75rem 1.25rem;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.newsletter-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-legal {
    display: flex;
    gap: 1.5rem;
}

.footer-legal a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-normal);
}

.footer-legal a:hover {
    color: var(--accent-primary);
}

/* ===== GLOBAL ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes glow {
    0%, 100% { box-shadow: 0 0 5px rgba(99, 102, 241, 0.5); }
    50% { box-shadow: 0 0 20px rgba(99, 102, 241, 0.8); }
}

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

@keyframes typing {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink {
    50% { border-color: transparent; }
}

/* Animation Classes */
.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fadeIn {
    animation: fadeIn 0.6s ease forwards;
}

.animate-slideInLeft {
    animation: slideInLeft 0.6s ease forwards;
}

.animate-slideInRight {
    animation: slideInRight 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }
.animate-delay-5 { animation-delay: 0.5s; }

/* Scroll Animations */
.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== GLOBAL COMPONENTS ===== */
.btn-modern {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary-modern {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary-modern:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(99, 102, 241, 0.4);
    color: white;
}

.btn-outline-modern {
    background: transparent;
    color: var(--accent-primary);
    border: 2px solid var(--accent-primary);
}

.btn-outline-modern:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
}

.btn-ghost {
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-primary);
    border: 1px solid var(--border-color);
}

.btn-ghost:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--accent-primary);
}

/* Cards */
.card-modern {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    padding: 2rem;
    transition: all var(--transition-normal);
}

.card-modern:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-primary);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
}

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

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Tech Badges */
.tech-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.85rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 8px;
    margin: 0.2rem;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.tech-badge:hover {
    transform: translateY(-2px);
    background: rgba(99, 102, 241, 0.2);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.tech-badge.aws {
    background: rgba(255, 153, 0, 0.1);
    color: #ff9900;
    border-color: rgba(255, 153, 0, 0.3);
}

.tech-badge.python {
    background: rgba(55, 118, 171, 0.1);
    color: #3776ab;
    border-color: rgba(55, 118, 171, 0.3);
}

.tech-badge.spark {
    background: rgba(232, 119, 34, 0.1);
    color: #e87722;
    border-color: rgba(232, 119, 34, 0.3);
}

/* Form Elements */
.form-modern {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.form-group-modern {
    margin-bottom: 1.5rem;
}

.form-label-modern {
    display: block;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.form-input-modern {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.875rem 1rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.form-input-modern:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-input-modern::placeholder {
    color: var(--text-muted);
}

textarea.form-input-modern {
    min-height: 150px;
    resize: vertical;
}

/* Message Alerts */
.alert-modern {
    background: var(--bg-card);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    border-left: 4px solid;
    animation: slideInRight 0.3s ease;
}

.alert-success {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.1);
}

.alert-danger {
    border-color: var(--danger);
    background: rgba(239, 68, 68, 0.1);
}

.alert-warning {
    border-color: var(--warning);
    background: rgba(245, 158, 11, 0.1);
}

.alert-info {
    border-color: var(--info);
    background: rgba(59, 130, 246, 0.1);
}

/* Loading Spinner */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Responsive */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.98);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: block;
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    main {
        padding-top: 70px;
    }
}

/* ===== HERO SECTION STYLES ===== */
.hero-modern {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-primary) 100%);
    padding-top: 80px;
}

.hero-modern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(6, 182, 212, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.1) 0%, transparent 60%);
    pointer-events: none;
}

.hero-modern::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

/* Floating Elements */
.floating-element {
    position: absolute;
    border-radius: 50%;
    opacity: 0.5;
    animation: float 6s ease-in-out infinite;
}

.floating-element:nth-child(1) {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), transparent);
    top: 10%;
    right: 10%;
    animation-delay: 0s;
}

.floating-element:nth-child(2) {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), transparent);
    bottom: 20%;
    left: 5%;
    animation-delay: 2s;
}

.floating-element:nth-child(3) {
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), transparent);
    top: 50%;
    right: 30%;
    animation-delay: 4s;
}

/* Particle Effect */
.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: particleFloat 15s infinite;
}

@keyframes particleFloat {
    0%, 100% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.3;
    }
    90% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

/* Code Block Styling */
.code-block {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 1.5rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    overflow-x: auto;
    border: 1px solid var(--border-color);
}

.code-block code {
    color: var(--text-primary);
}

/* Stats Cards */
.stat-card-modern {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.stat-card-modern:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
    box-shadow: var(--glow-primary);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

/* Icon Boxes */
.icon-box {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--accent-primary);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.icon-box:hover {
    background: var(--accent-gradient);
    color: white;
    transform: scale(1.1);
}

/* Timeline Styles */
.timeline-modern {
    position: relative;
    padding-left: 40px;
}

.timeline-modern::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary), var(--accent-tertiary));
}

.timeline-item-modern {
    position: relative;
    padding-bottom: 2rem;
}

.timeline-item-modern::before {
    content: '';
    position: absolute;
    left: -33px;
    top: 5px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent-primary);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 3px var(--accent-primary);
}

.timeline-item-modern:hover::before {
    animation: pulse 1s ease-in-out;
}

/* Utility Classes */
.text-gradient {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.border-gradient {
    border: 2px solid transparent;
    background: linear-gradient(var(--bg-primary), var(--bg-primary)) padding-box,
                var(--accent-gradient) border-box;
}

.glass-effect {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* Glow Effects */
.glow-primary {
    box-shadow: var(--glow-primary);
}

.glow-on-hover:hover {
    box-shadow: var(--glow-primary);
}