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

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111927;
    --text-primary: #e8edf5;
    --text-secondary: #8899bb;
    --accent: #00d4ff;
    --accent-dark: #0099cc;
    --card-bg: rgba(17, 25, 45, 0.7);
    --border-color: rgba(0, 212, 255, 0.15);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 14, 23, 0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 16px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 22px;
    font-weight: 700;
}

.logo-icon {
    background: var(--accent);
    color: var(--bg-primary);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 18px;
    font-weight: 800;
}

.logo-text {
    font-weight: 700;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 400;
    transition: color 0.3s;
    position: relative;
}

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

.btn-auth {
    background: var(--accent);
    color: var(--bg-primary) !important;
    padding: 8px 24px;
    border-radius: 8px;
    font-weight: 600 !important;
    transition: all 0.3s;
}

.btn-auth:hover {
    background: var(--accent-dark);
    transform: scale(1.05);
}

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.burger span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: 0.3s;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.06) 0%, transparent 70%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 40px 0;
}

.hero-text .badge {
    display: inline-block;
    background: rgba(0, 212, 255, 0.12);
    color: var(--accent);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

.hero-text h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 32px;
}

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

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
    padding: 14px 36px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    display: inline-block;
}

.btn-primary:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 212, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    padding: 14px 36px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
    display: inline-block;
}

.btn-secondary:hover {
    border-color: var(--accent);
    background: rgba(0, 212, 255, 0.05);
    transform: translateY(-2px);
}

.hero-code {
    position: relative;
}

.code-window {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.code-header {
    padding: 12px 16px;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.red { background: #ff5f56; }
.yellow { background: #ffbd2e; }
.green { background: #27c93f; }

.code-title {
    margin-left: 12px;
    font-size: 13px;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', monospace;
}

.code-body {
    padding: 20px;
    overflow-x: auto;
}

.code-body pre {
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    line-height: 1.8;
    color: #d4d4d4;
}

.code-body .comment {
    color: #6a9955;
}

.code-body .keyword {
    color: #569cd6;
}

.code-body .string {
    color: #ce9178;
}

.code-body .function {
    color: #dcdcaa;
}

.code-body .number {
    color: #b5cea8;
}

.features {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 12px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 36px 28px;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: 0 12px 40px rgba(0, 212, 255, 0.08);
}

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

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 15px;
}

.feature-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

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

.tech-stack {
    padding: 60px 0;
}

.tech-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-top: 20px;
}

.tech-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 28px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.tech-item:hover {
    border-color: var(--accent);
    color: var(--text-primary);
    transform: scale(1.05);
}

.projects {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 20px;
}

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

.project-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.project-tag {
    background: rgba(0, 212, 255, 0.1);
    color: var(--accent);
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
}

.project-date {
    color: var(--text-secondary);
    font-size: 13px;
}

.project-card h4 {
    font-size: 20px;
    margin-bottom: 10px;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 16px;
}

.project-link {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

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

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 48px 40px 40px;
    max-width: 440px;
    width: 90%;
    position: relative;
    animation: modalSlide 0.3s ease;
}

@keyframes modalSlide {
    from {
        transform: translateY(-30px) scale(0.95);
        opacity: 0;
    }
    to {
        transform: translateY(0) scale(1);
        opacity: 1;
    }
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 28px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.3s;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-header {
    text-align: center;
    margin-bottom: 32px;
}

.modal-header h2 {
    font-size: 28px;
    margin-bottom: 8px;
}

.modal-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

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

.auth-form label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 500;
}

.auth-form input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 15px;
    transition: border-color 0.3s;
    font-family: 'Inter', sans-serif;
}

.auth-form input:focus {
    outline: none;
    border-color: var(--accent);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    font-size: 14px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    cursor: pointer;
}

.forgot-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

.btn-full {
    width: 100%;
    text-align: center;
    padding: 14px;
    font-size: 16px;
}

.form-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

.form-footer a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

.form-footer a:hover {
    color: var(--accent-dark);
}

.footer {
    padding: 60px 0 24px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-info .logo {
    margin-bottom: 12px;
}

.footer-info p {
    color: var(--text-secondary);
    max-width: 400px;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.footer-column h4 {
    font-size: 16px;
    margin-bottom: 16px;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
    font-size: 14px;
}

.footer-column ul li a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-text h1 {
        font-size: 40px;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: rgba(10, 14, 23, 0.98);
        padding: 20px;
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.active {
        display: flex;
    }

    .burger {
        display: flex;
    }

    .hero-text h1 {
        font-size: 32px;
    }

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

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

    .footer-links {
        grid-template-columns: 1fr 1fr;
    }

    .modal-content {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 28px;
    }

    .hero-buttons {
        flex-direction: column;
    }

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