/* ============================================
   DARK THEME PORTFOLIO - STYLES
   ============================================ */

:root {
    --bg-dark: #0F1419;
    --bg-surface: #1A1F2E;
    --bg-hover: #252D3D;
    --accent-primary: #00D9FF;
    --accent-secondary: #7C3AED;
    --accent-success: #10B981;
    --accent-warning: #FF6B6B;
    --text-primary: #E5E7EB;
    --text-secondary: #9CA3AF;
    --border-color: #2D3748;

    --font-family: 'Roboto', 'Segoe UI', sans-serif;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

/* ============================================
   UTILITIES
   ============================================ */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn {
    display: inline-block;
    padding: 0.875rem 1.75rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    font-family: var(--font-family);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-dark);
    border-color: var(--accent-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 217, 255, 0.2);
}

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

.btn-secondary:hover {
    background: var(--accent-primary);
    color: var(--bg-dark);
}

/* ============================================
   NAVIGATION
   ============================================ */

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(15, 20, 25, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.nav-logo:hover {
    color: var(--accent-secondary);
}

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

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 1rem;
    transition: var(--transition);
    position: relative;
}

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

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

.nav-link.cta {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-dark);
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    font-weight: 500;
}

.nav-link.cta:after {
    display: none;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--accent-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    padding: 6rem 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
}

.hero-content {
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

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

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    animation: fadeInRight 0.8s ease;
}

.stat {
    text-align: center;
    padding: 2rem;
    background: var(--bg-surface);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.stat:hover {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================
   ABOUT SECTION
   ============================================ */

.about {
    padding: 6rem 2rem;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.05) 0%, rgba(0, 217, 255, 0.05) 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.05rem;
}

.about-stats {
    background: var(--bg-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

.about-stats h3 {
    color: var(--accent-primary);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.about-stats ul {
    list-style: none;
}

.about-stats li {
    padding: 0.75rem 0;
    color: var(--text-secondary);
    font-size: 1.05rem;
    transition: var(--transition);
}

.about-stats li:hover {
    color: var(--accent-primary);
    padding-left: 0.5rem;
}

/* ============================================
   SKILLS SECTION
   ============================================ */

.skills {
    padding: 6rem 2rem;
}

.skills-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.5rem 1.5rem;
    background: transparent;
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    border-radius: 2rem;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-dark);
    border-color: var(--accent-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1.5rem;
}

.skill-badge {
    padding: 1rem;
    background: var(--bg-surface);
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    text-align: center;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
}

.skill-badge:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 217, 255, 0.1);
}

/* ============================================
   EXPERIENCE SECTION
   ============================================ */

.experience {
    padding: 6rem 2rem;
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
}

.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline:before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
    top: 0;
}

.timeline-item {
    margin-bottom: 3rem;
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.timeline-item:nth-child(odd) .timeline-content {
    grid-column: 1;
}

.timeline-item:nth-child(even) .timeline-content {
    grid-column: 2;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: var(--accent-primary);
    border: 3px solid var(--bg-dark);
    border-radius: 50%;
    z-index: 10;
}

.timeline-content {
    background: var(--bg-surface);
    padding: 2rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.timeline-content:hover {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
    transform: translateY(-5px);
}

.exp-title {
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
}

.exp-company {
    font-size: 1.1rem;
    color: var(--accent-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.exp-date {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.exp-highlights {
    list-style: none;
    margin-bottom: 1rem;
}

.exp-highlights li {
    color: var(--text-secondary);
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.exp-highlights li:before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

.exp-tech {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tech-tag {
    background: rgba(0, 217, 255, 0.1);
    color: var(--accent-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.85rem;
    border: 1px solid rgba(0, 217, 255, 0.3);
}

/* ============================================
   PROJECTS SECTION
   ============================================ */

.projects {
    padding: 6rem 2rem;
}

.projects-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-card:hover {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 217, 255, 0.1);
}

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

.project-header h3 {
    font-size: 1.4rem;
    color: var(--accent-primary);
    flex: 1;
}

.project-category {
    background: rgba(124, 58, 237, 0.2);
    color: var(--accent-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 0.25rem;
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
    margin-left: 1rem;
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-highlights {
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.project-highlights h4 {
    color: var(--accent-primary);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.project-highlights ul {
    list-style: none;
    padding-left: 1rem;
}

.project-highlights li {
    color: var(--text-secondary);
    padding: 0.25rem 0;
    padding-left: 1rem;
    position: relative;
    font-size: 0.95rem;
}

.project-highlights li:before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-success);
    font-weight: bold;
}

.project-tech {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1rem;
}

.tech-badge {
    background: rgba(0, 217, 255, 0.1);
    color: var(--accent-primary);
    padding: 0.35rem 0.85rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    border: 1px solid rgba(0, 217, 255, 0.3);
}

.project-role {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

/* ============================================
   AWARDS SECTION
   ============================================ */

.awards {
    padding: 6rem 2rem;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.05) 0%, rgba(0, 217, 255, 0.05) 100%);
}

.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.award-card {
    background: var(--bg-surface);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.award-card:hover {
    border-color: var(--accent-warning);
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(255, 107, 107, 0.1);
}

.award-icon {
    font-size: 3rem;
    color: var(--accent-warning);
    margin-bottom: 1rem;
}

.award-card h3 {
    font-size: 1.3rem;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
}

.award-card p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.award-description {
    font-size: 0.95rem;
    line-height: 1.5;
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact {
    padding: 6rem 2rem;
}

.contact-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info h3 {
    font-size: 1.5rem;
    color: var(--accent-primary);
    margin-bottom: 1rem;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-surface);
    border-radius: 0.5rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.contact-method:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.contact-method i {
    font-size: 1.5rem;
}

.contact-form {
    background: var(--bg-surface);
    padding: 2rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 10px rgba(0, 217, 255, 0.2);
}

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

.contact-form button {
    width: 100%;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    padding: 2rem;
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 1.5rem;
    transition: var(--transition);
}

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

/* ============================================
   ANIMATIONS
   ============================================ */

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

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

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        padding: 4rem 2rem;
    }

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

    .timeline:before {
        left: 20px;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        padding-left: 60px;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        grid-column: 1;
    }

    .timeline-marker {
        left: 0;
        transform: translateX(-50%);
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-dark);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
    }

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

    .nav-toggle {
        display: block;
    }

    .nav-item {
        padding: 1rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .section-title {
        font-size: 2rem;
    }

    .hero {
        min-height: auto;
        padding: 3rem 2rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        display: block;
        text-align: center;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }

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

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

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .skills-filter,
    .projects-filter {
        flex-direction: column;
        align-items: center;
    }

    .filter-btn {
        width: 100%;
        max-width: 200px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .nav-container {
        padding: 0 1rem;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 2rem;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .skill-badge {
        padding: 0.75rem 0.5rem;
        font-size: 0.9rem;
    }

    .project-card {
        padding: 1.5rem;
    }

    .exp-title {
        font-size: 1.2rem;
    }

    .contact-method {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        gap: 1rem;
    }
}