/* ===========================
   ROOT VARIABLES & THEME
   =========================== */

:root {
    /* Light Mode Colors */
    --color-primary: #2d3436;
    --color-secondary: #6c5ce7;
    --color-accent: #00b894;
    
    --color-bg: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-text-primary: #2d3436;
    --color-text-secondary: #636e72;
    --color-border: #dfe6e9;
    
    --color-card-bg: #ffffff;
    --color-card-shadow: rgba(0, 0, 0, 0.08);
    
    /* Typography */
    --font-display: 'Playfair Display', serif;
    --font-body: 'Outfit', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* Transitions */
    --transition-fast: 200ms ease-out;
    --transition-base: 300ms ease-out;
    --transition-slow: 500ms ease-out;
}

/* Dark Mode */
body.dark-mode {
    --color-primary: #ffffff;
    --color-bg: #0f1419;
    --color-bg-secondary: #1a1f2e;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0b8c1;
    --color-border: #2d3436;
    
    --color-card-bg: #1a1f2e;
    --color-card-shadow: rgba(0, 0, 0, 0.3);
}

/* ===========================
   GLOBAL STYLES
   =========================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    transition: background-color var(--transition-base),
                color var(--transition-base);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===========================
   TYPOGRAPHY
   =========================== */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--color-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent);
}

/* ===========================
   BUTTONS
   =========================== */

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    font-family: var(--font-body);
}

.btn-primary {
    background-color: var(--color-secondary);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(108, 92, 231, 0.3);
}

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

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

/* ===========================
   NAVBAR
   =========================== */

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.9);
    transition: all var(--transition-base);
}

body.dark-mode .navbar {
    background-color: rgba(15, 20, 25, 0.9);
}

.navbar .container {
    padding: 1rem var(--spacing-md);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-secondary);
    min-width: 50px;
}

.logo-text {
    background: linear-gradient(135deg, #6c5ce7 0%, #00b894 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    font-weight: 500;
    color: var(--color-text-primary);
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-secondary);
    transition: width var(--transition-base);
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0.5rem;
    border-radius: var(--radius-md);
}

.theme-toggle:hover {
    background-color: var(--color-bg-secondary);
    transform: rotate(20deg);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 5px;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background-color: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

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

.hero {
    padding: var(--spacing-2xl) 0;
    min-height: 90vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
    overflow: hidden;
}

.hero .container {
    width: 100%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.hero-text {
    animation: slideInLeft 0.8s ease-out;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.highlight {
    background: linear-gradient(135deg, #6c5ce7 0%, #00b894 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.75rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

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

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-image {
    animation: slideInRight 0.8s ease-out;
}

.image-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px var(--color-card-shadow);
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.hero-image:hover .image-wrapper img {
    transform: scale(1.05);
}

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

.about {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-bg-secondary);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, #6c5ce7 0%, #00b894 100%);
    margin: var(--spacing-md) auto 0;
    border-radius: 2px;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: start;
}

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

.skills-highlight h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-lg);
}

.skills-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.skill-tag {
    background-color: var(--color-card-bg);
    color: var(--color-secondary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: 2px solid var(--color-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-base);
    cursor: pointer;
}

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

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

.experience {
    padding: var(--spacing-2xl) 0;
}

.timeline {
    position: relative;
    padding: var(--spacing-lg) 0;
}

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

.timeline-item {
    margin-bottom: var(--spacing-2xl);
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    animation: fadeInUp 0.8s ease-out both;
}

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

.timeline-item:nth-child(even) .timeline-content {
    grid-column: 3;
}

.timeline-marker {
    width: 16px;
    height: 16px;
    background-color: var(--color-secondary);
    border: 4px solid var(--color-bg);
    border-radius: 50%;
    grid-column: 2;
    transition: all var(--transition-base);
}

.timeline-item:hover .timeline-marker {
    background-color: var(--color-accent);
    transform: scale(1.3);
}

.timeline-content {
    background-color: var(--color-card-bg);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 15px var(--color-card-shadow);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    box-shadow: 0 8px 25px var(--color-card-shadow);
    transform: translateY(-4px);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    gap: var(--spacing-md);
}

.timeline-header h3 {
    margin: 0;
    font-size: 1.2rem;
}

.timeline-date {
    font-size: 0.85rem;
    color: var(--color-secondary);
    font-weight: 600;
    white-space: nowrap;
}

.timeline-company {
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.timeline-description {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

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

.projects {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background-color: var(--color-card-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 15px var(--color-card-shadow);
    transition: all var(--transition-base);
    animation: fadeInUp 0.8s ease-out both;
}

.project-card:nth-child(1) { animation-delay: 0.1s; }
.project-card:nth-child(2) { animation-delay: 0.2s; }
.project-card:nth-child(3) { animation-delay: 0.3s; }
.project-card:nth-child(4) { animation-delay: 0.4s; }
.project-card:nth-child(5) { animation-delay: 0.5s; }
.project-card:nth-child(6) { animation-delay: 0.6s; }

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px var(--color-card-shadow);
}

.project-image {
    position: relative;
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background-color: var(--color-bg-secondary);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

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

.project-links {
    display: flex;
    gap: var(--spacing-md);
}

.project-link {
    width: 50px;
    height: 50px;
    background-color: var(--color-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    transition: all var(--transition-base);
    font-size: 1.2rem;
}

.project-link:hover {
    background-color: var(--color-accent);
    transform: scale(1.1);
}

.project-info {
    padding: var(--spacing-lg);
}

.project-info h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.project-info p {
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.project-tags span {
    background-color: var(--color-bg-secondary);
    color: var(--color-secondary);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

.project-tags span:hover {
    background-color: var(--color-secondary);
    color: white;
}

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

.skills {
    padding: var(--spacing-2xl) 0;
}

.skills-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.skill-category {
    background-color: var(--color-card-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 15px var(--color-card-shadow);
    transition: all var(--transition-base);
}

.skill-category:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px var(--color-card-shadow);
}

.skill-category h3 {
    margin-bottom: var(--spacing-lg);
    color: var(--color-secondary);
}

.skill-bar {
    margin-bottom: var(--spacing-lg);
}

.skill-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
    font-weight: 500;
}

.skill-percentage {
    color: var(--color-secondary);
    font-weight: 700;
}

.skill-progress {
    height: 8px;
    background-color: var(--color-bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

.skill-fill {
    height: 100%;
    background: linear-gradient(90deg, #6c5ce7 0%, #00b894 100%);
    border-radius: 4px;
    animation: fillBar 1.5s ease-out forwards;
    width: 0;
}

@keyframes fillBar {
    from { width: 0; }
    to { width: var(--fill-width); }
}

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

.contact {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-bg-secondary);
}

.contact-intro {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    font-size: 1.1rem;
    color: var(--color-text-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-method {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    padding: var(--spacing-lg);
    background-color: var(--color-card-bg);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.contact-method:hover {
    transform: translateX(8px);
    box-shadow: 0 4px 15px var(--color-card-shadow);
}

.contact-method i {
    font-size: 1.5rem;
    color: var(--color-secondary);
    margin-top: 4px;
    min-width: 24px;
}

.contact-method h4 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1rem;
}

.contact-method p,
.contact-method a {
    margin: 0;
    font-size: 0.95rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.contact-form input,
.contact-form textarea {
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    background-color: var(--color-card-bg);
    color: var(--color-text-primary);
    transition: all var(--transition-base);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

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

.contact-form button {
    margin-top: var(--spacing-sm);
}

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

.footer {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid var(--color-border);
}

body.dark-mode .footer {
    background-color: #0f1419;
    color: white;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

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

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    background-color: rgba(108, 92, 231, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
    transition: all var(--transition-base);
    font-size: 1.1rem;
}

.social-link:hover {
    background-color: var(--color-secondary);
    color: white;
    transform: translateY(-4px);
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

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

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

@media (max-width: 768px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 2.5rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        animation: slideDown 0.3s ease-out;
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translateY(10px);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translateY(-10px);
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .hero-image {
        order: -1;
    }

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

    .timeline::before {
        left: 8px;
    }

    .timeline-item {
        grid-template-columns: 0 auto 1fr;
        gap: var(--spacing-md);
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        text-align: left;
        grid-column: 3;
    }

    .timeline-header {
        flex-direction: column;
    }

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

    .footer-content {
        justify-content: center;
        text-align: center;
    }

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

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

    .btn {
        width: 100%;
    }
}

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

    .nav-links {
        gap: var(--spacing-sm);
    }

    .skills-tags {
        gap: 0.5rem;
    }

    .skill-tag {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
    }

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

    .hero-buttons {
        gap: var(--spacing-sm);
    }

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.25rem;
    }
}