/* ===========================
   CSS Variables & Reset
   =========================== */

:root {
    /* Colors - Dark Mode */
    --bg: #0B0F14;
    --bg-light: #11121D;
    --card: rgba(255, 255, 255, 0.03);
    --surface: rgba(255, 255, 255, 0.05);
    --accent: #3B82F6;
    --accent2: #6D28D9;
    --accent-hover: #2563EB;
    --text: #E6EEF6;
    --text-secondary: #9BA8AB;
    --border: rgba(155, 168, 171, 0.1);

    /* Layout */
    --max-width: 1100px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;

    /* Typography */
    --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --font-display: "Poppins", "Inter", sans-serif;

    /* Transitions */
    --transition: 0.15s ease;
    --transition-slow: 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===========================
   Typography
   =========================== */

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

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

.inline-link {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-color: rgba(59, 130, 246, 0.3);
    transition: all var(--transition);
}

.inline-link:hover {
    text-decoration-color: var(--accent);
    color: var(--accent-hover);
}

/* ===========================
   Layout
   =========================== */

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

/* ===========================
   Header / Navigation
   =========================== */

.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(11, 15, 20, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 24px;
    height: 24px;
    color: var(--accent);
}

.logo-text {
    font-size: 1.125rem;
    font-weight: 700;
    font-family: var(--font-display);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition);
}

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

/* ===========================
   Buttons
   =========================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 20px;
    font-size: 0.9375rem;
    font-weight: 700;
    border-radius: var(--radius);
    cursor: pointer;
    transition: transform var(--transition), background var(--transition);
    border: none;
    text-align: center;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-hover), #5B21B6);
}

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

.btn-secondary:hover {
    border-color: var(--accent);
    background: rgba(59, 130, 246, 0.1);
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.875rem;
}

.btn-large {
    padding: 16px 32px;
    font-size: 1rem;
}

/* ===========================
   Hero Section
   =========================== */

.hero {
    position: relative;
    padding: var(--spacing-2xl) 0;
    overflow: hidden;
    z-index: 1;
}

.hero::before {
    content: '';
    position: absolute;
    top: calc(-100px + var(--parallax-offset, 0px));
    left: 0;
    right: 0;
    height: 600px;
    background: radial-gradient(ellipse at top, rgba(59, 130, 246, 0.15), transparent 60%);
    pointer-events: none;
    z-index: -1;
    transition: top 0.1s ease-out;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-tag {
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
}

.hero-title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--text) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}

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

.hero-subline {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.hero-visual {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.avatar-container {
    width: 100%;
    max-width: 360px;
    aspect-ratio: 1;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    position: relative;
}

.avatar-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(20%);
    transition: filter var(--transition-slow);
}

.avatar-container:hover .avatar-image {
    filter: grayscale(0%);
}

.skill-badges {
    position: absolute;
    bottom: -16px;
    right: -16px;
    display: flex;
    gap: 8px;
    padding: 12px;
    background: rgba(11, 15, 20, 0.8);
    backdrop-filter: blur(12px);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.badge {
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-blue {
    background: rgba(59, 130, 246, 0.2);
    color: #60A5FA;
}

.badge-purple {
    background: rgba(109, 40, 217, 0.2);
    color: #A78BFA;
}

.badge-green {
    background: rgba(16, 185, 129, 0.2);
    color: #34D399;
}

/* ===========================
   Skills Section
   =========================== */

.skills-section {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.skill-card {
    padding: var(--spacing-md);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: left 0.5s ease;
}

.skill-card:hover::before {
    left: 100%;
}

.skill-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--accent);
    background: var(--surface);
    box-shadow: 0 20px 40px rgba(59, 130, 246, 0.2), 0 0 0 1px rgba(59, 130, 246, 0.1);
}

.skill-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-sm);
    color: var(--accent);
}

.skill-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.skill-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* ===========================
   Tech Stack Section
   =========================== */

.tech-stack-section {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border);
    background: linear-gradient(180deg, transparent 0%, rgba(59, 130, 246, 0.03) 50%, transparent 100%);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-top: -16px;
    margin-bottom: var(--spacing-lg);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.tech-category {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: all var(--transition-slow);
}

.tech-category:hover {
    transform: translateY(-4px);
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: 0 12px 32px rgba(59, 130, 246, 0.15);
}

.tech-category-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--accent);
}

.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-badge {
    transition: transform var(--transition);
    display: inline-block;
}

.tech-badge:hover {
    transform: translateY(-2px) scale(1.05);
}

.tech-badge img {
    height: 28px;
    display: block;
}

/* ===========================
   Projects Section
   =========================== */

.projects-section {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-slow);
    position: relative;
}

.project-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-slow);
}

.project-card:hover::after {
    transform: scaleX(1);
}

.project-card:hover {
    transform: translateY(-12px) scale(1.02);
    border-color: var(--accent);
    box-shadow: 0 24px 64px rgba(59, 130, 246, 0.25), 0 0 0 1px rgba(59, 130, 246, 0.2);
}

.project-image {
    height: 200px;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.project-image-1 {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.25), rgba(109, 40, 217, 0.25));
}

.project-image-2 {
    background: linear-gradient(135deg, rgba(236, 72, 153, 0.25), rgba(239, 68, 68, 0.25));
}

.project-image-3 {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.25), rgba(59, 130, 246, 0.25));
}

.project-image-4 {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.25), rgba(239, 68, 68, 0.25));
}

.project-image-5 {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.25), rgba(59, 130, 246, 0.25));
}

/* New project gradient backgrounds */
.project-image-gradient-blue {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.3), rgba(6, 182, 212, 0.2));
}

.project-image-gradient-purple {
    background: linear-gradient(135deg, rgba(139, 92, 246, 0.3), rgba(236, 72, 153, 0.2));
}

.project-image-gradient-green {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.3), rgba(52, 211, 153, 0.2));
}

.project-image-gradient-orange {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.3), rgba(251, 191, 36, 0.2));
}

.project-image-youtube {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.25), rgba(220, 38, 38, 0.15));
}

/* Featured project card */
.project-featured {
    grid-column: 1 / -1;
}

/* Project links container */
.project-links {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-top: var(--spacing-sm);
}

.project-link {
    color: var(--accent);
    font-weight: 500;
    font-size: 0.875rem;
    transition: all var(--transition);
}

.project-link:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

/* YouTube channel links */
.youtube-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: var(--spacing-sm);
}

.youtube-link {
    color: #EF4444;
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all var(--transition);
}

.youtube-link:hover {
    color: #DC2626;
    transform: translateX(4px);
}

.project-overlay {
    color: white;
    opacity: 0.5;
    transition: all var(--transition-slow);
    transform: scale(0.9);
}

.project-card:hover .project-overlay {
    opacity: 1;
    transform: scale(1.1) rotate(5deg);
}

.project-content {
    padding: var(--spacing-md);
}

.project-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.project-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    padding: 4px 10px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.tag:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(59, 130, 246, 0.1);
}

.project-link {
    display: inline-block;
    margin-top: var(--spacing-sm);
    color: var(--accent);
}

.timeline {
    max-width: 800px;
}

.timeline-item {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) 0;
    border-left: 2px solid var(--border);
    margin-left: 80px;
    padding-left: var(--spacing-lg);
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: var(--spacing-md);
    width: 10px;
    height: 10px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--bg);
}

.timeline-date {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
}

.timeline-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.timeline-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* ===========================
   Certifications Section
   =========================== */

.certifications-section {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border);
}

.certificate-container {
    display: flex;
    justify-content: center;
}

.certificate-card {
    display: flex;
    flex-direction: column;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    max-width: 800px;
    width: 100%;
    transition: all var(--transition-slow);
}

.certificate-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.certificate-image {
    width: 100%;
    height: auto;
    object-fit: cover;
    border-bottom: 1px solid var(--border);
}

.certificate-content {
    padding: var(--spacing-md);
}

.certificate-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text);
}

.certificate-issuer {
    font-size: 0.9375rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.certificate-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.certificate-date {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    opacity: 0.8;
}

@media (min-width: 768px) {
    .certificate-card {
        flex-direction: row;
        align-items: center;
    }

    .certificate-image {
        width: 300px;
        height: 100%;
        border-bottom: none;
        border-right: 1px solid var(--border);
    }
}

/* ===========================
   About Section
   =========================== */

.about-section {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border);
}

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

.about-text {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about-text strong {
    color: var(--text);
    font-weight: 600;
}

/* ===========================
   Contact Section
   =========================== */

.contact-section {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text-secondary);
    transition: all var(--transition);
}

.social-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-6px) rotate(5deg);
    box-shadow: 0 12px 32px rgba(59, 130, 246, 0.3);
}

/* ===========================
   Footer
   =========================== */

.footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--border);
    text-align: center;
}

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

/* ===========================
   Responsive Design
   =========================== */

@media (max-width: 768px) {
    .nav-links {
        gap: var(--spacing-sm);
    }

    .nav-link {
        display: none;
    }

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

    .hero-visual {
        order: -1;
    }

    .avatar-container {
        max-width: 280px;
    }

    .skill-badges {
        bottom: -12px;
        right: 50%;
        transform: translateX(50%);
    }

    .timeline-item {
        grid-template-columns: 1fr;
        margin-left: 20px;
        padding-left: var(--spacing-md);
    }

    .timeline-date {
        margin-bottom: 4px;
    }
}

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

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

    .btn {
        width: 100%;
    }

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

    /* Fix mobile text wrapping for contact info */
    .hero-subline {
        font-size: 0.8125rem;
        line-height: 1.6;
        word-break: break-word;
        overflow-wrap: break-word;
        position: relative;
        z-index: 10;
        margin-top: var(--spacing-sm);
    }

    .hero-content {
        position: relative;
        z-index: 10;
    }
}

/* ===========================
   Animations
   =========================== */

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

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

.hero-content>* {
    animation: fadeInUp 0.6s ease forwards;
    opacity: 0;
}

.hero-tag {
    animation-delay: 0.1s;
}

.hero-title {
    animation-delay: 0.2s;
}

.hero-description {
    animation-delay: 0.3s;
}

.hero-buttons {
    animation-delay: 0.4s;
}

.hero-subline {
    animation-delay: 0.5s;
}