/* Import distinctive fonts */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* CSS Variables for theming */
:root {
    --color-bg-primary: #0a0f1a;
    --color-bg-secondary: #111827;
    --color-accent-primary: #22d3ee;
    --color-accent-secondary: #a78bfa;
    --color-accent-tertiary: #f472b6;
    --color-text-primary: #f8fafc;
    --color-text-secondary: #94a3b8;
    --color-border: rgba(148, 163, 184, 0.1);
    --font-display: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

body {
    font-family: var(--font-display);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Mesh gradient background */
.mesh-gradient {
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    background: 
        radial-gradient(ellipse 80% 50% at 20% 40%, rgba(34, 211, 238, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse 60% 50% at 80% 20%, rgba(167, 139, 250, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse 50% 60% at 60% 80%, rgba(244, 114, 182, 0.08) 0%, transparent 50%),
        linear-gradient(180deg, var(--color-bg-primary) 0%, #0d1424 50%, var(--color-bg-primary) 100%);
}

/* Noise texture overlay */
.noise-overlay {
    position: fixed;
    inset: 0;
    z-index: -1;
    opacity: 0.03;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Grid pattern overlay */
.grid-pattern {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background-image: 
        linear-gradient(rgba(148, 163, 184, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(148, 163, 184, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 0%, transparent 70%);
}

/* Floating orbs */
.orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
    pointer-events: none;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: var(--color-accent-primary);
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: var(--color-accent-secondary);
    top: 60%;
    right: 10%;
    animation-delay: -5s;
}

.orb-3 {
    width: 250px;
    height: 250px;
    background: var(--color-accent-tertiary);
    bottom: 10%;
    left: 30%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(30px, -30px) scale(1.05); }
    50% { transform: translate(-20px, 20px) scale(0.95); }
    75% { transform: translate(20px, 10px) scale(1.02); }
}

/* Particles */
.particle {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
}

.particle-down, .particle-up {
    transition: transform 0.1s ease-out;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header styles */
.profile-ring {
    position: relative;
}

.profile-ring::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    padding: 4px;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    -webkit-mask: 
        linear-gradient(#fff 0 0) content-box, 
        linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

.profile-glow {
    position: absolute;
    inset: -20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    filter: blur(40px);
    opacity: 0.4;
    animation: pulse-glow 4s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.1); }
}

/* Title gradient */
.title-gradient {
    background: linear-gradient(135deg, 
        var(--color-accent-primary) 0%, 
        var(--color-accent-secondary) 50%, 
        var(--color-accent-tertiary) 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: gradient-shift 6s ease infinite;
}

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

/* Subtitle with mono font */
.subtitle {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--color-text-secondary);
    letter-spacing: 0.05em;
}

/* Decorative divider */
.divider {
    display: flex;
    align-items: center;
    gap: 12px;
}

.divider span {
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    border-radius: 1px;
}

.divider span:first-child,
.divider span:last-child {
    width: 60px;
}

.divider span:nth-child(2) {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent-primary);
}

/* Section titles */
.section-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 2rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    border-radius: 2px;
}

/* Cards */
.card {
    background: rgba(17, 24, 39, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 2rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, 
        rgba(34, 211, 238, 0.05) 0%, 
        transparent 50%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.card:hover {
    transform: translateY(-8px);
    border-color: rgba(34, 211, 238, 0.3);
    box-shadow: 
        0 20px 40px -20px rgba(34, 211, 238, 0.3),
        0 0 60px -20px rgba(167, 139, 250, 0.2);
}

.card:hover::before {
    opacity: 1;
}

/* Skill cards */
.skill-card {
    position: relative;
}

.skill-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: linear-gradient(135deg, 
        rgba(34, 211, 238, 0.2), 
        rgba(167, 139, 250, 0.2));
    font-size: 1.25rem;
    color: var(--color-accent-primary);
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.skill-card:hover .skill-icon {
    transform: scale(1.1) rotate(5deg);
    background: linear-gradient(135deg, 
        rgba(34, 211, 238, 0.3), 
        rgba(167, 139, 250, 0.3));
}

.skill-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    color: var(--color-text-primary);
}

.skill-text {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.skill-bar {
    height: 3px;
    background: rgba(148, 163, 184, 0.1);
    border-radius: 2px;
    margin-top: 1.5rem;
    overflow: hidden;
}

.skill-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary));
    width: 0;
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.skill-card:hover .skill-bar-fill {
    width: 100%;
}

/* Experience card */
.experience-card {
    position: relative;
    padding-left: 2rem;
}

.experience-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--color-accent-primary), var(--color-accent-secondary));
    border-radius: 2px;
}

.experience-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: linear-gradient(135deg, 
        rgba(34, 211, 238, 0.15), 
        rgba(167, 139, 250, 0.15));
    border-radius: 20px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent-primary);
    margin-bottom: 1rem;
}

/* Academic timeline */
.timeline-item {
    position: relative;
    padding-left: 2rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--color-accent-primary), var(--color-accent-secondary));
    border-radius: 2px;
}

.timeline-item::after {
    content: '';
    position: absolute;
    left: -4px;
    top: 24px;
    width: 11px;
    height: 11px;
    background: var(--color-accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--color-accent-primary);
}

/* Services grid */
.service-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    font-size: 1.5rem;
    color: white;
    margin: 0 auto 1.5rem;
    transition: all 0.4s ease;
}

.service-card:hover .service-icon {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 20px 40px -10px rgba(34, 211, 238, 0.4);
}

/* Form styles */
.form-input {
    width: 100%;
    padding: 14px 18px;
    background: rgba(17, 24, 39, 0.8);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    color: var(--color-text-primary);
    font-family: var(--font-display);
    font-size: 0.95rem;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
}

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

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 8px;
}

.form-button {
    width: 100%;
    padding: 16px 24px;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    border: none;
    border-radius: 12px;
    color: var(--color-bg-primary);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.form-button::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-accent-secondary), var(--color-accent-tertiary));
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    border-radius: 12px;
}

.form-button:hover::before {
    opacity: 1;
}

.form-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px -10px rgba(34, 211, 238, 0.5);
}

.form-button span {
    position: relative;
    z-index: 1;
}

.form-button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Social buttons */
.social-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 14px 28px;
    background: rgba(17, 24, 39, 0.6);
    backdrop-filter: blur(8px);
    border: 1px solid var(--color-border);
    border-radius: 50px;
    color: var(--color-text-primary);
    font-family: var(--font-display);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-button:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent-primary);
    box-shadow: 0 10px 30px -10px rgba(34, 211, 238, 0.3);
}

/* Hero Contact Button */
.hero-contact-btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 32px;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    border-radius: 50px;
    color: var(--color-bg-primary);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(34, 211, 238, 0.2);
}

.hero-contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(34, 211, 238, 0.4);
    filter: brightness(1.1);
}

/* Sticky Contact Button */
.sticky-contact-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 50;
    padding: 12px 24px;
    background: rgba(17, 24, 39, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--color-accent-primary);
    border-radius: 50px;
    color: var(--color-text-primary);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.sticky-contact-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.sticky-contact-btn:hover {
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    color: var(--color-bg-primary);
    transform: translateY(-4px);
    box-shadow: 0 15px 35px -10px rgba(34, 211, 238, 0.4);
}

.social-button i {
    font-size: 1.25rem;
    transition: transform 0.3s ease;
}

.social-button:hover i {
    transform: scale(1.2);
}

/* Language selector */
.language-select {
    background: rgba(17, 24, 39, 0.6);
    backdrop-filter: blur(8px);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    padding: 10px 16px;
    color: var(--color-text-primary);
    font-family: var(--font-display);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.language-select:hover,
.language-select:focus {
    border-color: var(--color-accent-primary);
    outline: none;
}

/* Footer */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 3rem 0;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.footer-built {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-accent-primary);
    opacity: 0.7;
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--color-accent-secondary), var(--color-accent-tertiary));
}

/* Selection */
::selection {
    background-color: rgba(34, 211, 238, 0.3);
    color: white;
}

::-moz-selection {
    background-color: rgba(34, 211, 238, 0.3);
    color: white;
}

/* Focus states */
a:focus,
button:focus {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

/* Animations */
@keyframes fade-in-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-in-down {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fade-in-up 0.6s ease-out forwards;
}

.animate-fade-in-down {
    animation: fade-in-down 0.6s ease-out forwards;
}

/* Stagger delays */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }

/* Responsive */
@media (max-width: 768px) {
    .card:hover {
        transform: translateY(-4px);
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .orb {
        opacity: 0.3;
    }
}

/* Ripple effect */
.ripple {
    position: absolute;
    border-radius: 50%;
    background-color: rgba(34, 211, 238, 0.5);
    transform: scale(0);
    animation: ripple-animation 0.6s linear;
    pointer-events: none;
}

@keyframes ripple-animation {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* Status messages */
.status-success {
    color: #4ade80;
}

.status-error {
    color: #f87171;
}