/* ===========================
   CSS Custom Properties
   =========================== */
:root {
    /* Colors - Vercel Inspired Dark Theme */
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #111111;

    /* Gradient Colors */
    --gradient-1: #667eea;
    --gradient-2: #764ba2;
    --gradient-3: #f093fb;
    --gradient-4: #4facfe;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a1a1a1;
    --text-muted: #666666;

    /* Accent Colors */
    --accent-primary: #0070f3;
    --accent-hover: #0051cc;
    --accent-light: #3291ff;

    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.875rem;
    --font-size-sm: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --font-size-xl: 2rem;
    --font-size-2xl: 3rem;
    --font-size-3xl: 4rem;

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

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

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

/* ===========================
   Navigation
   =========================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: var(--spacing-sm) 0;
}

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

.nav-logo {
    font-size: var(--font-size-lg);
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    background: linear-gradient(135deg, var(--gradient-1), var(--gradient-4));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform var(--transition-fast);
}

.nav-logo:hover {
    transform: scale(1.1);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--gradient-1), var(--gradient-4));
    transition: width var(--transition-normal);
}

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

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

/* ===========================
   Hero Section
   =========================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: var(--spacing-lg) var(--spacing-md);
}

.gradient-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
            var(--gradient-1) 0%,
            var(--gradient-2) 25%,
            var(--gradient-3) 50%,
            var(--gradient-4) 100%);
    opacity: 0.15;
    animation: gradientShift 15s ease infinite;
    background-size: 400% 400%;
}

@keyframes gradientShift {

    0%,
    100% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1000px;
    width: 100%;
}

.hero-profile {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    justify-content: center;
}

.hero-photo {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--glass-border);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.3);
    transition: all var(--transition-normal);
}

.hero-photo:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 50px rgba(102, 126, 234, 0.5);
}

.hero-text {
    text-align: left;
    flex: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, var(--font-size-3xl));
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 3vw, var(--font-size-lg));
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--gradient-1), var(--gradient-4));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.875rem 2rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    display: inline-block;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent-primary);
    color: var(--text-primary);
    border: none;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 112, 243, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
}

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

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(10px);
    }
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--text-secondary);
    border-radius: 15px;
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background: var(--text-secondary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% {
        opacity: 1;
        top: 8px;
    }

    100% {
        opacity: 0;
        top: 20px;
    }
}

/* ===========================
   Section Styles
   =========================== */
.section {
    padding: var(--spacing-xl) var(--spacing-md);
    position: relative;
}

.section-dark {
    background-color: var(--bg-secondary);
}

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

.section-title {
    font-size: clamp(2rem, 5vw, var(--font-size-2xl));
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===========================
   Glass Card Effect
   =========================== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
}

.glass-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

/* ===========================
   About Section
   =========================== */
.about-content-new {
    max-width: 800px;
    margin: 0 auto;
}

.about-text {
    padding: var(--spacing-lg);
    text-align: center;
}

.about-text p {
    font-size: var(--font-size-md);
    line-height: 1.8;
    color: var(--text-secondary);
}

/* ===========================
   Education Section
   =========================== */
.education-content {
    max-width: 600px;
    margin: 0 auto;
}

.education-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.education-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.education-institution {
    font-size: var(--font-size-md);
    color: var(--gradient-1);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.text-muted {
    color: var(--text-muted);
    font-size: var(--font-size-xs);
}

/* ===========================
   Skills Section
   =========================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.skill-category {
    padding: var(--spacing-lg);
}

.skill-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.skill-icon {
    font-size: 2rem;
}

.skill-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    background: rgba(102, 126, 234, 0.15);
    color: var(--gradient-1);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    border: 1px solid rgba(102, 126, 234, 0.3);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: rgba(102, 126, 234, 0.25);
    border-color: rgba(102, 126, 234, 0.5);
    transform: scale(1.05);
}

/* ===========================
   Timeline - Experience Section
   =========================== */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--gradient-1), var(--gradient-4));
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: var(--spacing-lg);
}

.timeline-marker {
    position: absolute;
    left: 11px;
    top: 0;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gradient-1), var(--gradient-4));
    box-shadow: 0 0 0 4px var(--bg-primary);
    z-index: 1;
}

.timeline-content {
    padding: var(--spacing-lg);
}

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

.timeline-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.company {
    color: var(--gradient-1);
    font-weight: 600;
    font-size: var(--font-size-md);
}

.timeline-date {
    text-align: right;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.timeline-date span {
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
}

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

.timeline-description {
    list-style: none;
    padding-left: var(--spacing-sm);
}

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

.timeline-description li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--gradient-1);
    font-weight: bold;
}

/* ===========================
   Projects Section
   =========================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

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

.project-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.project-icon {
    font-size: 2.5rem;
}

.project-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

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

/* ===========================
   Contact Section
   =========================== */
.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

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

.contact-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto;
}

.contact-card {
    text-align: center;
    padding: var(--spacing-lg);
    text-decoration: none;
    color: inherit;
    display: block;
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.contact-card h3 {
    font-size: var(--font-size-md);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.contact-card p {
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    word-break: keep-all;
    overflow-wrap: normal;
}

/* ===========================
   Footer
   =========================== */
.footer {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--glass-border);
}

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

/* ===========================
   Animations
   =========================== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    .nav-menu {
        gap: var(--spacing-sm);
    }

    .nav-link {
        font-size: 0.75rem;
    }

    .hero {
        padding: var(--spacing-md) var(--spacing-sm);
    }

    .hero-profile {
        flex-direction: column;
        text-align: center;
    }

    .hero-text {
        text-align: center;
    }

    .hero-photo {
        width: 200px;
        height: 200px;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

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

    .timeline::before {
        left: 10px;
    }

    .timeline-item {
        padding-left: 40px;
    }

    .timeline-marker {
        left: 1px;
        width: 18px;
        height: 18px;
    }

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

    .timeline-date {
        text-align: left;
    }

    .contact-cards {
        grid-template-columns: 1fr;
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .nav-container {
        padding: 0 var(--spacing-sm);
    }

    .nav-menu {
        gap: 0.5rem;
    }
}