:root {
    --bg: #0a0a0c;
    --bg-alt: #121216;
    --text: #f0f0f5;
    --text-muted: #a0a0b0;
    --accent: #00d2ff;
    --accent-rgb: 0, 210, 255;
    --border: rgba(255, 255, 255, 0.08);
    --card-bg: rgba(25, 25, 30, 0.6);
    --gradient: linear-gradient(135deg, #00d0ff75 0%, #3a7bd5 100%);
    --nav-bg: rgba(10, 10, 12, 0.8);
}

[data-theme="light"] {
    --bg: #f5f7fa;
    --bg-alt: #ffffff;
    --text: #1a1a20;
    --text-muted: #606070;
    --accent: #0072ff;
    --accent-rgb: 0, 114, 255;
    --border: rgba(0, 0, 0, 0.08);
    --card-bg: rgba(255, 255, 255, 0.9);
    --nav-bg: rgba(245, 247, 250, 0.8);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    overflow-wrap: break-word;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    background-color: var(--bg);
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: transparent;
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    transition: color 0.4s ease;
}

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

/* Loader */
#loader {
    position: fixed;
    inset: 0;
    background: var(--bg);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.6s ease, visibility 0.6s;
}

.loader-circle {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loader-text {
    position: absolute;
    margin-top: 100px;
    font-size: 0.7rem;
    letter-spacing: 3px;
    color: var(--accent);
    font-weight: 800;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 3D Canvas */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
    opacity: 0.6;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--border);
    transition: padding 0.3s ease;
}

.navbar.scrolled {
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -1px;
}

.dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 15px var(--accent);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    gap: 3rem;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

#theme-toggle {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.6rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

#theme-toggle:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.mobile-toggle {
    display: none;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 0.6rem;
    border-radius: 12px;
    cursor: pointer;
}

/* Hero */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
}

.badge {
    display: inline-block;
    background: rgba(var(--accent-rgb), 0.1);
    color: var(--accent);
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 2px;
    margin-bottom: 2rem;
    border: 1px solid rgba(var(--accent-rgb), 0.2);
}

.hero h1 {
    font-size: clamp(3rem, 10vw, 5.5rem);
    line-height: 1;
    font-weight: 800;
    letter-spacing: -4px;
    margin-bottom: 1.5rem;
}

.text-gradient {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 650px;
    margin-bottom: 3rem;
    font-weight: 400;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
}

.btn {
    padding: 1rem 2.5rem;
    border-radius: 14px;
    text-decoration: none;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.3s cubic-bezier(0.23, 1, 0.32, 1);
}

.btn-primary {
    background: var(--accent);
    color: white;
    box-shadow: 0 10px 25px -5px rgba(var(--accent-rgb), 0.4);
}

.btn-primary:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 35px -5px rgba(var(--accent-rgb), 0.5);
}

.btn-outline {
    border: 1px solid var(--border);
    color: var(--text);
}

.btn-outline:hover {
    background: var(--bg-alt);
    border-color: var(--accent);
}

.scroll-prompt {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--text-muted);
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 2px;
}

.mouse-icon {
    width: 22px;
    height: 38px;
    border: 2px solid var(--border);
    border-radius: 20px;
    position: relative;
}

.mouse-icon::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    width: 4px;
    height: 8px;
    background: var(--accent);
    border-radius: 2px;
    transform: translateX(-50%);
    animation: scroll-anim 2s infinite;
}

@keyframes scroll-anim {
    0% { opacity: 1; transform: translate(-50%, 0); }
    100% { opacity: 0; transform: translate(-50%, 15px); }
}

/* Sections */
.section {
    padding: 10rem 0;
}

.bg-alt {
    background-color: var(--bg-alt);
}

.section-header {
    margin-bottom: 5rem;
}

.section-tag {
    color: var(--accent);
    font-weight: 800;
    font-size: 0.8rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    display: block;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -2px;
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--card-bg);
    padding: 3rem;
    border-radius: 28px;
    border: 1px solid var(--border);
    transition: all 0.4s ease;
    backdrop-filter: blur(10px);
}

.skill-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
}

.card-icon {
    width: 60px;
    height: 60px;
    background: var(--bg);
    border-radius: 18px;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--accent);
    margin-bottom: 2rem;
    border: 1px solid var(--border);
}

.skill-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
}

.skill-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
}

.project-card {
    background: var(--bg);
    border-radius: 32px;
    padding: 3.5rem;
    border: 1px solid var(--border);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    position: relative;
    overflow: hidden;
}

.project-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent);
    box-shadow: 0 30px 60px -15px rgba(0,0,0,0.3);
}

.project-type {
    font-size: 0.7rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 1rem;
    display: block;
}

.project-card h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.project-card p {
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.project-meta, .project-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.status-offline {
    font-size: 0.75rem;
    color: #ef4444;
    font-weight: 700;
    background: rgba(239, 68, 68, 0.1);
    padding: 0.4rem 1rem;
    border-radius: 50px;
}

.source-none {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
}

.link-btn {
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.link-btn:hover {
    color: var(--accent);
}

/* Timeline */
.timeline {
    max-width: 850px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 10px;
    bottom: 10px;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    padding-left: 70px;
    margin-bottom: 5rem;
}

.timeline-dot {
    position: absolute;
    left: 12px;
    top: 5px;
    width: 18px;
    height: 18px;
    background: var(--bg);
    border: 3px solid var(--accent);
    border-radius: 50%;
    z-index: 2;
    box-shadow: 0 0 15px var(--accent);
}

.timeline-date {
    font-weight: 800;
    color: var(--accent);
    font-size: 0.85rem;
    display: block;
    margin-bottom: 0.5rem;
}

.timeline-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-muted);
}

/* Profil boxes */
.profil-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 2rem;
}

.profil-box {
    background: var(--card-bg);
    padding: 3.5rem;
    border-radius: 32px;
    border: 1px solid var(--border);
}

.profil-box h3 {
    margin-bottom: 2rem;
    font-size: 1.75rem;
}

.pill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    list-style: none;
}

.pill-list li {
    background: var(--bg);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    border: 1px solid var(--border);
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--text-muted);
    transition: all 0.3s ease;
}

.pill-list li:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* Contact */
.contact-card {
    background: var(--gradient) rgba(0, 0, 0, 0.3);
    padding: 6rem 4rem;
    border-radius: 40px;
    text-align: center;
    color: white;
}

.contact-card h2 {
    font-size: 3.5rem;
    letter-spacing: -2px;
    margin-bottom: 1rem;
}

.contact-card p {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 3.5rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.contact-btn {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 1rem 2.5rem;
    border-radius: 18px;
    color: white;
    text-decoration: none;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.contact-btn:hover {
    background: white;
    color: #1a1a20;
    transform: translateY(-5px);
}

/* Footer */
.footer {
    padding: 5rem 0;
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer p {
    color: var(--text-muted);
    font-weight: 700;
    font-size: 0.9rem;
}

/* Animations */
.reveal {
    opacity: 1;
    transform: none;
}

.js-enabled .reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Navbar actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-doc-link {
    color: var(--text-muted);
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
}

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

/* Footer extra */
.footer-extra {
    margin-top: 1rem;
}

.footer-extra a {
    color: var(--accent);
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 600;
}

@media (max-width: 768px) {
    .nav-links { 
        display: none; 
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--nav-bg);
        flex-direction: column;
        padding: 2rem;
        border-bottom: 1px solid var(--border);
        backdrop-filter: blur(20px);
    }
    .nav-links.active { display: flex; }
    .mobile-toggle { display: block; }
    .hero h1 { 
        font-size: 3rem; 
        letter-spacing: -2px;
    }
    .section-title { font-size: 2.2rem; }
    .profil-grid { grid-template-columns: 1fr; }
    .contact-links { flex-direction: column; }
    .contact-card { padding: 4rem 1.5rem; }
    .skills-grid, .projects-grid {
        grid-template-columns: 1fr;
    }
    .project-card, .skill-card {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 2.5rem; }
    .container { padding: 0 1.5rem; }
}