/* ===== CSS Variables - Black & White Theme ===== */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-dark: #0a0a0a;
    --bg-card: #ffffff;
    --text-primary: #0a0a0a;
    --text-secondary: #525252;
    --text-muted: #a3a3a3;
    --border-color: #e5e5e5;
    --accent: #0a0a0a;
    --accent-light: #262626;
    --success: #22c55e;
    --warning: #f59e0b;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --font-main: 'Space Grotesk', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 20px;
    font-weight: 600;
    text-decoration: none;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 2px;
}

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

.logo-text {
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

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

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

.nav-link-cta {
    background: var(--accent);
    color: white !important;
    padding: 10px 20px;
    border-radius: 8px;
}

.nav-link-cta::after {
    display: none;
}

.nav-link-cta:hover {
    background: var(--accent-light);
}

.nav-user-menu {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-username {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

.nav-link-logout {
    background: none;
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    font-family: var(--font-main);
    transition: all 0.2s ease;
}

.nav-link-logout:hover {
    border-color: #ef4444;
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

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

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(0,0,0,0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0,0,0,0.03) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    max-width: 560px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -2px;
}

.hero-title .highlight {
    position: relative;
    display: inline-block;
}

.hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 0;
    right: 0;
    height: 12px;
    background: rgba(0, 0, 0, 0.1);
    z-index: -1;
}

.hero-description {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-main);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    border: none;
}

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

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

.btn-service {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 24px;
    margin-top: 20px;
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-main);
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 10px;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-service:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Hero Avatar/Image */
.hero-visual {
    display: flex;
    justify-content: center;
    position: relative;
}

.hero-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 32px;
    box-shadow: var(--shadow-lg);
    max-width: 400px;
    width: 100%;
    position: relative;
}

.hero-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, var(--border-color) 0%, transparent 50%, var(--border-color) 100%);
    border-radius: 26px;
    z-index: -1;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.avatar {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    background: linear-gradient(135deg, #e5e5e5 0%, #f5f5f5 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 700;
    color: var(--text-secondary);
}

.card-info h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
}

.card-info p {
    font-size: 14px;
    color: var(--text-muted);
}

.card-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.stat-item {
    text-align: center;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: 12px;
}

.stat-value {
    font-size: 24px;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-primary);
}

.stat-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

.card-level {
    background: var(--accent);
    color: white;
    padding: 16px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.level-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.level-icon {
    font-size: 24px;
}

.level-text {
    font-size: 14px;
    font-weight: 500;
}

.level-badge {
    font-family: var(--font-mono);
    font-size: 20px;
    font-weight: 700;
}

/* ===== Section Styles ===== */
.section {
    padding: 100px 0;
}

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

.section-dark .text-secondary {
    color: #a3a3a3;
}

.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.section-description {
    font-size: 16px;
    color: var(--text-secondary);
}

/* ===== Skills Section ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
    text-align: center;
    transition: all 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent);
}

.skill-icon {
    width: 56px;
    height: 56px;
    background: var(--bg-secondary);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 24px;
}

.skill-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.skill-level {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.skill-bar {
    width: 60px;
    height: 6px;
    background: var(--border-color);
    border-radius: 3px;
    overflow: hidden;
}

.skill-bar-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 3px;
}

.skill-percent {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-muted);
}

/* ===== Experience Section ===== */
.experience-list {
    max-width: 800px;
    margin: 0 auto;
}

.experience-item {
    display: flex;
    gap: 32px;
    padding: 32px 0;
    border-bottom: 1px solid var(--border-color);
}

.experience-item:last-child {
    border-bottom: none;
}

.exp-date {
    flex-shrink: 0;
    width: 120px;
    font-family: var(--font-mono);
    font-size: 13px;
    color: var(--text-muted);
}

.exp-content {
    flex: 1;
}

.exp-company {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.exp-role {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.exp-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.exp-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.exp-tag {
    font-family: var(--font-mono);
    font-size: 12px;
    padding: 6px 12px;
    background: var(--bg-secondary);
    border-radius: 6px;
    color: var(--text-secondary);
}

/* ===== Projects Section ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    height: 200px;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--text-muted);
}

.project-content {
    padding: 28px;
}

.project-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.project-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.project-tech span {
    font-family: var(--font-mono);
    font-size: 11px;
    padding: 4px 10px;
    background: var(--bg-secondary);
    border-radius: 4px;
    color: var(--text-secondary);
}

.project-links {
    display: flex;
    gap: 12px;
}

.project-link {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

.project-link:hover {
    text-decoration: underline;
}

/* ===== Team Section ===== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.team-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s ease;
}

.team-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.team-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 24px;
    font-weight: 700;
    font-family: var(--font-mono);
}

.team-info {
    text-align: center;
}

.team-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.team-role {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.team-bio {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.team-social {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.team-social-link {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    text-decoration: none;
    padding: 6px 12px;
    background: var(--bg-secondary);
    border-radius: 6px;
    transition: all 0.2s ease;
}

.team-social-link:hover {
    background: var(--accent);
    color: white;
}

/* ===== Achievements Section ===== */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.achievement-card {
    background: #141414;
    border: 1px solid #262626;
    border-radius: 16px;
    padding: 28px;
    text-align: center;
    transition: all 0.3s ease;
}

.achievement-card:hover {
    border-color: #404040;
    transform: translateY(-4px);
}

.achievement-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.achievement-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: white;
}

.achievement-description {
    font-size: 13px;
    color: #737373;
}

/* ===== Contact Section ===== */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.contact-info h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-info p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.contact-method:hover {
    background: var(--border-color);
    transform: translateX(4px);
}

.contact-method-icon {
    width: 44px;
    height: 44px;
    background: var(--accent);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: white;
}

.contact-method-text {
    flex: 1;
}

.contact-method-label {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.contact-method-value {
    font-weight: 500;
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 32px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 8px;
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    font-size: 14px;
    font-family: var(--font-main);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    background: white;
}

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

/* ===== Footer ===== */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 24px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 40px;
    border-bottom: 1px solid #262626;
    margin-bottom: 24px;
}

.footer-brand .nav-logo {
    color: white;
    font-size: 18px;
    margin-bottom: 8px;
}

.footer-brand .logo-bracket {
    color: #525252;
}

.footer-tagline {
    font-size: 14px;
    color: #737373;
    margin-top: 8px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-social {
    font-size: 14px;
    color: #737373;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-social:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    font-size: 13px;
    color: #525252;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

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

    .achievements-grid,
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        bottom: 0;
        background: white;
        flex-direction: column;
        padding: 40px 24px;
        gap: 24px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-link {
        font-size: 18px;
    }

    .nav-link-cta {
        width: 100%;
        text-align: center;
        margin-top: 16px;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-description {
        font-size: 16px;
    }

    .hero-card {
        padding: 24px;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .skill-card {
        padding: 20px;
    }

    .experience-item {
        flex-direction: column;
        gap: 12px;
    }

    .exp-date {
        width: auto;
    }

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

    .achievements-grid,
    .team-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    
    .team-card {
        padding: 24px;
    }

    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 28px;
    }

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

    .btn {
        width: 100%;
    }

    .card-stats {
        grid-template-columns: 1fr;
        gap: 12px;
    }

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

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}