/* ===== CSS RESET & VARIABLES ===== */
:root {
    /* Colors */
    --primary-color: #2563eb;
    --secondary-color: #f59e0b;
    --accent-color: #10b981;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 10px 15px rgba(0, 0, 0, 0.1);

    /* Dark mode colors */
    --dark-bg-primary: #0f172a;
    --dark-bg-secondary: #1e293b;
    --dark-bg-tertiary: #334155;
    --dark-text-primary: #f1f5f9;
    --dark-text-secondary: #cbd5e1;
    --dark-text-light: #94a3b8;
    --dark-border-color: #475569;

    /* Typography */
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 5rem 0;
    --element-spacing: 2rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border radius */
    --border-radius-sm: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
}

/* Dark mode variables */
[data-theme="dark"] {
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --text-light: var(--dark-text-light);
    --bg-primary: var(--dark-bg-primary);
    --bg-secondary: var(--dark-bg-secondary);
    --bg-tertiary: var(--dark-bg-tertiary);
    --border-color: var(--dark-border-color);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
    padding-top: 70px;
    /* Add padding for fixed navbar */
}

/* ===== UTILITY CLASSES ===== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1rem;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border: none;
    border-radius: var(--border-radius-md);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1rem;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

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

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

.accent-color {
    color: var(--accent-color);
}

/* ===== PRELOADER ===== */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.preloader-content {
    text-align: center;
}

.logo-animation {
    width: 80px;
    height: 80px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    animation: spin 1s linear infinite;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
}

.loading-text {
    color: var(--text-secondary);
    font-size: 1rem;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    z-index: 9999;
    transition: all var(--transition-normal);
    will-change: transform;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.1);
}

[data-theme="dark"] .navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo a {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: bold;
    color: var(--text-primary);
    text-decoration: none;
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

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

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

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

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

.theme-toggle:hover {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    padding: 8px;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    z-index: 10000;
}

.hamburger:hover {
    background: var(--bg-secondary);
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

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

.hero-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    z-index: 2;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
    z-index: 2;
}

.hero-avatar {
    position: relative;
    width: 400px;
    height: 400px;
    margin: 0 auto;
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 8px solid var(--bg-primary);
    box-shadow: var(--shadow-heavy);
}

.avatar-border {
    position: absolute;
    top: -10px;
    left: -10px;
    width: calc(100% + 20px);
    height: calc(100% + 20px);
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    z-index: -1;
    animation: rotate 8s linear infinite;
}

@keyframes rotate {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-down {
    color: var(--text-secondary);
    font-size: 1.5rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0);
    }

    40% {
        transform: translateY(-10px);
    }

    60% {
        transform: translateY(-5px);
    }
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* ===== ABOUT SECTION ===== */
.about {
    padding: var(--section-padding);
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: start;
    margin-bottom: 4rem;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
}

.about-quote {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--bg-primary);
    padding: 1.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
    max-width: 250px;
}

.about-quote i {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.about-quote p {
    font-style: italic;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.about-text h3 {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.about-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.about-details {
    display: grid;
    gap: 1rem;
    margin-bottom: 2rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-primary);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-light);
}

.detail-item i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.detail-item h4 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.detail-item p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.soft-skills h4 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.skill-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    background: var(--bg-primary);
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-light);
}

.skill-item i {
    color: var(--accent-color);
}

.timeline {
    margin-top: 3rem;
}

.timeline h3 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-primary);
}

.timeline-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

.timeline-container::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    transform: translateX(-50%);
    border-radius: 2px;
}

/* ===== ABOUT TIMELINE STYLES ===== */
.timeline {
    position: relative;
    max-width: 1000px;
    margin: 3rem auto 0;
}

.timeline-container {
    position: relative;
}

.timeline-container::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    transform: translateX(-50%);
    border-radius: var(--border-radius-full);
    box-shadow: var(--shadow-medium);
}

.timeline-item {
    position: relative;
    margin-bottom: 4rem;
    display: flex;
    align-items: center;
    min-height: 120px;
}

.timeline-item:nth-child(odd) {
    justify-content: flex-end;
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: calc(50% + 2rem);
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: calc(50% + 2rem);
    text-align: left;
}

.timeline .timeline-icon {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    box-shadow: var(--shadow-heavy);
    border: 4px solid var(--bg-primary);
    z-index: 10;
}

.timeline .timeline-date {
    position: absolute;
    left: 50%;
    top: -15px;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
    box-shadow: var(--shadow-medium);
    z-index: 11;
    border: 2px solid var(--bg-primary);
}

.timeline-content {
    max-width: 45%;
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
}

.timeline-content h4 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 0;
    height: 0;
    border: 10px solid transparent;
    transform: translateY(-50%);
}

.timeline-item:nth-child(odd) .timeline-content::before {
    left: 100%;
    border-left-color: var(--bg-secondary);
}

.timeline-item:nth-child(even) .timeline-content::before {
    right: 100%;
    border-right-color: var(--bg-secondary);
}

[data-theme="dark"] .timeline-item:nth-child(odd) .timeline-content::before {
    border-left-color: var(--bg-secondary);
}

[data-theme="dark"] .timeline-item:nth-child(even) .timeline-content::before {
    border-right-color: var(--bg-secondary);
}

.timeline-content h4 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

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

/* ===== SKILLS SECTION ===== */
.skills {
    padding: var(--section-padding);
    background: var(--bg-primary);
}

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

.skill-category {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
    transition: transform var(--transition-normal);
}

.skill-category:hover {
    transform: translateY(-5px);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.category-header i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.category-header h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--text-primary);
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.skills-list .skill-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--bg-primary);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
}

.skills-list .skill-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-medium);
}

.skills-list .skill-item i {
    color: var(--accent-color);
    font-size: 1.25rem;
}

.skills-list .skill-item span {
    flex: 1;
    margin-left: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.skill-level {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-sm);
}

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

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

.project-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-heavy);
}

.project-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

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

.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, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.project-links {
    display: flex;
    gap: 1rem;
}

.project-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    text-decoration: none;
    transition: all var(--transition-normal);
}

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

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

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

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

.tech-tag {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

/* ===== EXPERIENCE SECTION ===== */
.experience {
    padding: var(--section-padding);
    background: var(--bg-primary);
}

.experience-timeline {
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    transform: translateX(-50%);
    border-radius: var(--border-radius-full);
    box-shadow: var(--shadow-medium);
}

.experience-timeline .timeline-item {
    position: relative;
    margin-bottom: 4rem;
    display: flex;
    align-items: center;
    min-height: 120px;
}

.experience-timeline .timeline-item:nth-child(odd) {
    justify-content: flex-end;
}

.experience-timeline .timeline-item:nth-child(even) {
    justify-content: flex-start;
}

.experience-timeline .timeline-item:nth-child(odd) .timeline-content {
    margin-right: calc(50% + 2rem);
    text-align: right;
}

.experience-timeline .timeline-item:nth-child(even) .timeline-content {
    margin-left: calc(50% + 2rem);
    text-align: left;
}

.timeline-icon {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    box-shadow: var(--shadow-heavy);
    border: 4px solid var(--bg-primary);
    z-index: 10;
}

.experience-timeline .timeline-content {
    max-width: 45%;
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-color);
}

.experience-timeline .timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
}

.timeline-date {
    position: absolute;
    left: 50%;
    top: -15px;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--accent-color), var(--primary-color));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    white-space: nowrap;
    box-shadow: var(--shadow-medium);
    z-index: 11;
    border: 2px solid var(--bg-primary);
}

.experience-timeline .timeline-content h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.timeline-subtitle {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.experience-timeline .timeline-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.experience-timeline ul {
    list-style: none;
    padding-left: 0;
}

.experience-timeline li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.experience-timeline li::before {
    content: '▶';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-size: 0.75rem;
}

/* ===== ACHIEVEMENTS SECTION ===== */
.achievements {
    padding: var(--section-padding);
    background: var(--bg-secondary);
}

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

.achievement-card {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-medium);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.achievement-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: left var(--transition-slow);
}

.achievement-card:hover::before {
    left: 0;
}

.achievement-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-heavy);
}

.achievement-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    margin: 0 auto 1.5rem;
}

.achievement-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

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

.achievement-year {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    font-weight: 600;
    font-size: 0.875rem;
}

/* ===== GALLERY SECTION ===== */
.gallery {
    padding: var(--section-padding);
    background: var(--bg-primary);
}

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

.filter-btn {
    background: transparent;
    border: 2px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.gallery-item {
    position: relative;
    height: 250px;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.gallery-item.hidden {
    display: none;
}

.gallery-item:hover {
    transform: scale(1.05);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 1.5rem;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-info {
    color: white;
}

.gallery-info h4 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.gallery-info p {
    font-size: 0.875rem;
    opacity: 0.8;
}

.gallery-view {
    align-self: flex-end;
    background: var(--primary-color);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

/* ===== CONTACT SECTION ===== */
.contact {
    padding: var(--section-padding);
    background: var(--bg-secondary);
}

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

.contact-info h3 {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

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

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-item i {
    color: var(--primary-color);
    font-size: 1.25rem;
    width: 20px;
    text-align: center;
}

.contact-item h4 {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.contact-item p {
    color: var(--text-secondary);
    margin: 0;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    border-radius: 50%;
    text-decoration: none;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-light);
}

.social-links a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.contact-form {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
}

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

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: inherit;
    transition: border-color var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--bg-tertiary);
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-logo a {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-primary);
    text-decoration: none;
}

.footer-left p {
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.heart {
    color: var(--accent-color);
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.footer-links {
    display: flex;
    gap: 2rem;
}

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

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

.footer-right p {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* ===== SCROLL TO TOP ===== */
.scroll-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 1000;
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    background: var(--accent-color);
    transform: translateY(-3px);
}

/* ===== LIGHTBOX ===== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.lightbox-close:hover {
    color: var(--accent-color);
}

.lightbox img {
    max-width: 100%;
    max-height: 80vh;
    border-radius: var(--border-radius-lg);
}

.lightbox-caption {
    text-align: center;
    color: white;
    margin-top: 1rem;
    font-size: 1.125rem;
}

/* ===== TOAST NOTIFICATION ===== */
.toast {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-heavy);
    z-index: 10000;
    transform: translateX(400px);
    transition: transform var(--transition-normal);
}

.toast.show {
    transform: translateX(0);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
}

.toast-content i {
    color: var(--accent-color);
    font-size: 1.25rem;
}

.toast-message {
    color: var(--text-primary);
    font-weight: 500;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-primary);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: 2rem;
        transition: left var(--transition-normal);
        border-top: 1px solid var(--border-color);
        z-index: 9998;
        overflow-y: auto;
    }

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

    .hamburger {
        display: flex;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

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

    .hero-avatar {
        width: 300px;
        height: 300px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-quote {
        position: relative;
        bottom: auto;
        right: auto;
        margin-top: 1rem;
    }

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

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .timeline-container::before,
    .experience-timeline::before {
        left: 30px;
        transform: none;
    }

    /* Timeline Mobile Styles */
    .timeline-container {
        padding: 0 1rem;
    }

    .timeline-container::before {
        left: 30px;
        transform: none;
    }

    .experience-timeline::before {
        left: 30px;
        transform: none;
    }

    .timeline-item,
    .experience-timeline .timeline-item {
        flex-direction: row !important;
        justify-content: flex-start !important;
        align-items: flex-start;
        margin-bottom: 3rem;
        min-height: auto;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content,
    .experience-timeline .timeline-item:nth-child(odd) .timeline-content,
    .experience-timeline .timeline-item:nth-child(even) .timeline-content {
        margin-left: 70px;
        margin-right: 0;
        text-align: left;
        max-width: calc(100% - 90px);
    }

    .timeline-item:nth-child(odd) .timeline-content::before,
    .timeline-item:nth-child(even) .timeline-content::before {
        display: none;
    }

    .timeline-date {
        position: absolute;
        left: 30px;
        top: -10px;
        transform: translateX(-50%);
        margin-bottom: 0;
        font-size: 0.75rem;
        padding: 0.4rem 0.75rem;
        z-index: 11;
    }

    .timeline .timeline-icon,
    .timeline-icon {
        left: 30px;
        top: 30px;
        transform: translateX(-50%);
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

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

    .btn {
        padding: 0.75rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }

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

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

    .hero-avatar {
        width: 250px;
        height: 250px;
    }

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

    .gallery-filters {
        flex-direction: column;
        align-items: center;
    }

    .social-links {
        justify-content: center;
    }

    .toast {
        left: 1rem;
        right: 1rem;
        transform: translateY(-100px);
    }

    .toast.show {
        transform: translateY(0);
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease-out;
}

.animate-fadeInLeft {
    animation: fadeInLeft 0.6s ease-out;
}

.animate-fadeInRight {
    animation: fadeInRight 0.6s ease-out;
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== PRINT STYLES ===== */
@media print {

    .navbar,
    .scroll-to-top,
    .hamburger,
    .theme-toggle,
    .preloader,
    .lightbox,
    .toast {
        display: none !important;
    }

    body {
        background: white !important;
        color: black !important;
    }

    .section-title::after {
        background: black !important;
    }
}