/* ========================================
   VEDANTIUM.DEV - PERSONAL PORTFOLIO SITE
   ======================================== */

:root {
  --primary: #60a5fa;
  --primary-light: #93c5fd;
  --secondary: #a78bfa;
  --bg-dark: #0f172a;
  --bg-medium: #1e293b;
  --bg-light: #334155;
  --text-main: #e2e8f0;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border: #475569;
  --white: #fff;
}

/* ========================================
   RESET & BASE STYLES
   ======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bg-dark);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   NAVIGATION
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.nav-logo a:hover {
    color: var(--primary-light);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-main);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--primary);
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #e2e8f0;
    margin: 3px 0;
    transition: 0.3s;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-medium) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23334155" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.1;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.highlight {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(96, 165, 250, 0.3);
}

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

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

.social-links, .social-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.social-links a, .social-link {
    color: var(--text-muted);
    font-size: 1.5rem;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: var(--bg-light);
    border: 2px solid var(--border);
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-links a:hover, .social-link:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(96, 165, 250, 0.2);
}

/* ========================================
   SECTION STYLES
   ======================================== */
section {
    padding: 5rem 0;
}

section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: #f1f5f9;
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about {
    background: var(--bg-dark);
    text-align: center;
}

.about p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.about p:last-child {
    margin-bottom: 0;
}

/* ========================================
   PROJECTS SECTION
   ======================================== */
.projects {
    background: var(--bg-medium);
}

/* --- Projects Section --- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    align-items: stretch;
}

.project-card {
    background: var(--bg-light);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    min-height: 320px;
    height: 100%;
    position: relative;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border-color: var(--primary);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.project-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #f1f5f9;
}

.project-lang {
    position: absolute;
    right: 1.5rem;
    bottom: 1.5rem;
    background: var(--primary);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    z-index: 2;
    box-shadow: 0 2px 8px rgba(96,165,250,0.08);
}

.project-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    flex: 1 1 auto;
}

.project-links {
    margin-top: auto;
}

.project-links a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.25em;
}

.project-links a:hover {
    color: var(--primary-light);
}

/* ========================================
   ACHIEVEMENTS SECTION - TIMELINE
   ======================================== */
.achievements {
    background: var(--bg-medium);
    text-align: center;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding: 1rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--secondary));
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 16px;
    height: 16px;
    background: var(--primary);
    border: 3px solid var(--bg-medium);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    box-shadow: 0 0 0 4px rgba(96, 165, 250, 0.2);
}

.timeline-content {
    background: var(--bg-light);
    border-radius: 12px;
    padding: 1rem;
    width: 45%;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
    position: relative;
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    border-color: var(--primary);
}

.timeline-icon {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
    display: block;
}

.timeline-content h3 {
    color: #f1f5f9;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

/* Responsive Timeline */
@media (max-width: 768px) {
    .timeline {
        padding: 0.5rem 0;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: row !important;
        margin-bottom: 1rem;
        margin-left: 60px;
    }
    
    .timeline-dot {
        left: 30px;
    }
    
    .timeline-content {
        width: 100%;
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .timeline {
        padding: 0.5rem 0;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        margin-bottom: 0.75rem;
        margin-left: 40px;
    }
    
    .timeline-dot {
        left: 20px;
        width: 12px;
        height: 12px;
    }
    
    .timeline-content {
        padding: 0.75rem;
    }
    
    .timeline-icon {
        font-size: 1.25rem;
    }
    
    .timeline-content h3 {
        font-size: 0.95rem;
    }
    
    .timeline-content p {
        font-size: 0.85rem;
    }
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact {
    background: var(--bg-medium);
    text-align: center;
}

.contact-intro {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: #334155;
    border: 2px solid #475569;
    border-radius: 50%;
    color: #94a3b8;
    font-size: 1.5rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    color: #60a5fa;
    border-color: #60a5fa;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(96, 165, 250, 0.2);
}

/* Responsive Contact */
@media (max-width: 480px) {
    .social-links {
        gap: 1.5rem;
    }
    
    .social-link {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--bg-dark);
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid var(--bg-light);
}

.footer p {
    color: var(--text-muted);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(15, 23, 42, 0.95);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        backdrop-filter: blur(10px);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    section {
        padding: 3rem 0;
    }

    section h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .container {
        padding: 0 15px;
    }

    .project-card {
        padding: 1.5rem;
    }

    .achievements li {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }

    .project-lang {
        right: 1rem;
        bottom: 1rem;
        font-size: 0.8rem;
        padding: 3px 10px;
    }
}

/* ========================================
   ANIMATIONS & EFFECTS
   ======================================== */
html {
    scroll-behavior: smooth;
}

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

.project-card,
.achievements li {
    animation: fadeInUp 0.6s ease-out;
}