:root {
    --md-sys-color-primary: #208085;
    --md-sys-color-on-primary: #ffffff;
    --md-sys-color-primary-container: #a4f0f6;
    --md-sys-color-on-primary-container: #002021;

    --md-sys-color-secondary: #8b7355;
    --md-sys-color-on-secondary: #ffffff;
    --md-sys-color-secondary-container: #fde0c7;
    --md-sys-color-on-secondary-container: #352213;

    --md-sys-color-surface: #fffbfe;
    --md-sys-color-on-surface: #1c1b1f;
    --md-sys-color-background: #fffbfe;
    --md-sys-color-on-background: #1c1b1f;

    --md-sys-color-outline: #c4c7c5;
    --md-sys-color-outline-variant: #d2cfcc;

    --md-elevation-level1:
        0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --md-elevation-level2:
        0 3px 6px rgba(0, 0, 0, 0.15), 0 2px 4px rgba(0, 0, 0, 0.12);
}

@media (prefers-color-scheme: dark) {
    :root {
        --md-sys-color-primary: #a4f0f6;
        --md-sys-color-on-primary: #003638;
        --md-sys-color-primary-container: #005559;
        --md-sys-color-on-primary-container: #a4f0f6;

        --md-sys-color-secondary: #e0c4ad;
        --md-sys-color-on-secondary: #4a3728;
        --md-sys-color-secondary-container: #6b5140;
        --md-sys-color-on-secondary-container: #fde0c7;

        --md-sys-color-surface: #1c1b1f;
        --md-sys-color-on-surface: #e8e6eb;
        --md-sys-color-background: #1c1b1f;
        --md-sys-color-on-background: #e8e6eb;

        --md-sys-color-outline: #8d8d91;
        --md-sys-color-outline-variant: #4e504b;
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family:
        "Roboto",
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    background-color: var(--md-sys-color-background);
    color: var(--md-sys-color-on-background);
    line-height: 1.6;
}

/* Навигация */
header {
    background-color: var(--md-sys-color-surface);
    box-shadow: var(--md-elevation-level1);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo {
    font-size: 24px;
    font-weight: 600;
    color: var(--md-sys-color-primary);
    text-decoration: none;
    letter-spacing: 0.5px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 32px;
}

nav a {
    text-decoration: none;
    color: var(--md-sys-color-on-background);
    font-weight: 500;
    font-size: 14px;
    transition: color 0.3s cubic-bezier(0.2, 0, 0, 1);
    position: relative;
}

nav a:hover {
    color: var(--md-sys-color-primary);
}

nav a::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--md-sys-color-primary);
    transition: width 0.3s cubic-bezier(0.2, 0, 0, 1);
    border-radius: 3px;
}

nav a:hover::after {
    width: 100%;
}

/* Hero секция */
.hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 24px;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.hero .subtitle {
    font-size: 18px;
    color: var(--md-sys-color-secondary);
    margin-bottom: 48px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    padding: 12px 28px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
    box-shadow: var(--md-elevation-level1);
}

.cta-button:hover {
    box-shadow: var(--md-elevation-level2);
    transform: translateY(-2px);
}

.cta-button:active {
    transform: translateY(0);
}

/* Основной контент */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 64px 0;
    border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

section:last-of-type {
    border-bottom: none;
}

section h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

section .section-description {
    font-size: 16px;
    color: var(--md-sys-color-on-background);
    margin-bottom: 48px;
    max-width: 700px;
}

/* О себе */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.about-text h3 {
    font-size: 22px;
    margin: 24px 0 16px 0;
    color: var(--md-sys-color-primary);
}

.about-text p {
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 16px;
    color: var(--md-sys-color-on-background);
}

.about-card {
    background-color: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: 12px;
    padding: 32px;
    box-shadow: var(--md-elevation-level1);
}

.about-card h4 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--md-sys-color-secondary);
}

.about-card p {
    font-size: 14px;
    margin-bottom: 0;
}

/* Портфолио */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.project-card {
    background-color: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--md-elevation-level1);
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.project-card:hover {
    box-shadow: var(--md-elevation-level2);
    transform: translateY(-4px);
}

.project-image {
    width: 100%;
    height: 220px;
    background: linear-gradient(
        135deg,
        var(--md-sys-color-primary-container),
        var(--md-sys-color-secondary-container)
    );
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    overflow: hidden;
}

.project-image iframe {
    border-radius: 12px 12px 0 0;
}

.project-content {
    padding: 24px;
}

.project-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--md-sys-color-on-background);
}

.project-description {
    font-size: 14px;
    color: var(--md-sys-color-on-background);
    margin-bottom: 16px;
    line-height: 1.6;
}

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

.project-tag {
    background-color: var(--md-sys-color-primary-container);
    color: var(--md-sys-color-on-primary-container);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
}

/* Значения */
.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 32px;
}

.value-item {
    background-color: var(--md-sys-color-surface);
    border: 1px solid var(--md-sys-color-outline-variant);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    box-shadow: var(--md-elevation-level1);
}

.value-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--md-sys-color-primary);
}

.value-item p {
    font-size: 14px;
    color: var(--md-sys-color-on-background);
    line-height: 1.6;
    margin-bottom: 0;
}

/* Контакты */
.contact-section {
    text-align: center;
    padding-bottom: 64px;
}

.contact-info {
    background-color: var(--md-sys-color-secondary-container);
    border-radius: 16px;
    padding: 24px 32px;
    margin-bottom: 32px;
}

.contact-link {
    display: inline-block;
    margin: 12px;
    padding: 12px 24px;
    background-color: var(--md-sys-color-secondary);
    color: var(--md-sys-color-on-secondary);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
}

.contact-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--md-elevation-level1);
}

/* Footer */
footer {
    background-color: var(--md-sys-color-surface);
    border-top: 1px solid var(--md-sys-color-outline-variant);
    padding: 32px 24px;
    text-align: center;
    color: var(--md-sys-color-on-background);
    font-size: 14px;
}

/* Адаптив */
@media (max-width: 768px) {
    nav ul {
        gap: 16px;
    }

    .hero h1 {
        font-size: 36px;
    }

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

    section h2 {
        font-size: 28px;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

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

section {
    animation: fadeInUp 0.6s ease-out;
}