/* index.css — Material Design 3 + тёмная тема + анимация фона */

:root {
    --md-primary: #7F745F;
    --md-on-primary: #FFFFFF;
    --md-primary-container: #E8E2D6;
    --md-on-primary-container: #2D2820;
    --md-secondary: #6B6358;
    --md-on-secondary: #FFFFFF;
    --md-secondary-container: #F2ECE2;
    --md-on-secondary-container: #242018;
    --md-tertiary: #5C6B5A;
    --md-on-tertiary: #FFFFFF;
    --md-tertiary-container: #DFE8DB;
    --md-on-tertiary-container: #1A2318;
    --md-error: #BA1A1A;
    --md-error-container: #FFDAD6;
    --md-on-error-container: #410002;
    --md-surface: #FDF8F3;
    --md-on-surface: #1C1B18;
    --md-surface-variant: #E8E3D8;
    --md-on-surface-variant: #4A4740;
    --md-outline: #7B776F;
    --md-outline-variant: #CCC7BC;
    --md-surface-container-lowest: #FFFFFF;
    --md-surface-container-low: #F7F2EC;
    --md-surface-container: #F1ECE6;
    --md-surface-container-high: #EBE6E0;
    --md-surface-container-highest: #E5E0DA;
    --md-inverse-surface: #31302C;
    --md-inverse-on-surface: #F4EFE9;
    --md-shadow-1: 0px 1px 3px 0px rgba(0, 0, 0, 0.15), 0px 1px 1px 0px rgba(0, 0, 0, 0.10);
    --md-shadow-2: 0px 2px 6px 0px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.12);
    --md-shadow-3: 0px 4px 8px 3px rgba(0, 0, 0, 0.10), 0px 1px 3px 0px rgba(0, 0, 0, 0.14);
    --md-shadow-4: 0px 6px 10px 4px rgba(0, 0, 0, 0.10), 0px 2px 4px -1px rgba(0, 0, 0, 0.14);
    --md-elevation-transition: box-shadow 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    --md-motion-easing-standard: cubic-bezier(0.4, 0, 0.2, 1);
    --md-motion-easing-emphasized: cubic-bezier(0.05, 0.7, 0.1, 1.0);
    --md-motion-duration-short: 200ms;
    --md-motion-duration-medium: 400ms;
    --border-radius-xs: 8px;
    --border-radius-sm: 12px;
    --border-radius-md: 16px;
    --border-radius-lg: 20px;
    --border-radius-xl: 24px;
    --border-radius-full: 9999px;
}

body.dark-theme {
    --md-primary: #B8AD96;
    --md-on-primary: #1C1B18;
    --md-primary-container: #4A463C;
    --md-on-primary-container: #E8E2D6;
    --md-secondary: #9E9487;
    --md-on-secondary: #1C1B18;
    --md-secondary-container: #35322C;
    --md-on-secondary-container: #F2ECE2;
    --md-tertiary: #8C9B89;
    --md-on-tertiary: #1C1B18;
    --md-tertiary-container: #2E3730;
    --md-on-tertiary-container: #DFE8DB;
    --md-error: #FFB4AB;
    --md-error-container: #93000A;
    --md-on-error-container: #FFDAD6;
    --md-surface: #121212;
    --md-on-surface: #E6E1D9;
    --md-surface-variant: #4A4740;
    --md-on-surface-variant: #C9C5BC;
    --md-outline: #8E8A82;
    --md-outline-variant: #4A4740;
    --md-surface-container-lowest: #0F0F0F;
    --md-surface-container-low: #1C1B18;
    --md-surface-container: #201F1C;
    --md-surface-container-high: #2B2A26;
    --md-surface-container-highest: #363430;
    --md-inverse-surface: #E6E1D9;
    --md-inverse-on-surface: #1C1B18;
}

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

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--md-surface);
    color: var(--md-on-surface);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    transition: background-color var(--md-motion-duration-medium) var(--md-motion-easing-standard);
}

/* Top App Bar */
.md-top-app-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 64px;
    background-color: var(--md-surface-container);
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 8px;
    transition: var(--md-elevation-transition), background-color var(--md-motion-duration-medium);
    border-bottom: 1px solid transparent;
}

.md-top-app-bar.scrolled {
    box-shadow: var(--md-shadow-2);
    border-bottom: 1px solid var(--md-outline-variant);
    background-color: var(--md-surface-container-high);
}

.md-top-app-bar__title {
    font-family: 'Roboto Slab', serif;
    font-size: 1.25rem;
    font-weight: 600;
    flex: 1;
}

.md-top-app-bar__nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.md-top-app-bar__nav a {
    text-decoration: none;
    color: var(--md-on-surface-variant);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 8px 14px;
    border-radius: var(--border-radius-full);
    transition: all var(--md-motion-duration-short);
}

.md-top-app-bar__nav a:hover,
.md-top-app-bar__nav a.active {
    background-color: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

.md-menu-btn,
.md-theme-toggle {
    display: flex;
    background: none;
    border: none;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
    color: var(--md-on-surface-variant);
    transition: background-color var(--md-motion-duration-short);
}

.md-menu-btn:hover,
.md-theme-toggle:hover {
    background-color: var(--md-surface-container-highest);
}

.md-theme-toggle {
    margin-left: 4px;
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 24px 60px;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, var(--md-surface-container-lowest) 0%, var(--md-primary-container) 60%, var(--md-surface-container) 100%);
}

.hero__bg-pattern {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 70%;
    height: 140%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(127, 116, 95, 0.15) 0%, transparent 70%);
    pointer-events: none;
    animation: heroBgPulse 8s ease-in-out infinite;
}

@keyframes heroBgPulse {
    0%, 100% { transform: scale(1) rotate(0deg);}
    33% { transform: scale(1.08) rotate(3deg);}
    66% { transform: scale(0.95) rotate(-2deg);}
}

/* Анимированный фон (дополнительные круги) */
.hero__bg-animated {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.bg-circle {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, var(--md-primary) 0%, transparent 70%);
    opacity: 0.1;
    animation: floatCircle 12s infinite ease-in-out;
}

.bg-circle-1 {
    width: 300px;
    height: 300px;
    bottom: -100px;
    left: -100px;
    animation-delay: 0s;
}

.bg-circle-2 {
    width: 500px;
    height: 500px;
    top: -200px;
    right: -150px;
    animation-delay: 2s;
    animation-duration: 15s;
}

.bg-circle-3 {
    width: 200px;
    height: 200px;
    bottom: 20%;
    right: 10%;
    animation-delay: 4s;
    animation-duration: 10s;
}

.bg-circle-4 {
    width: 400px;
    height: 400px;
    top: 40%;
    left: -150px;
    animation-delay: 1s;
    animation-duration: 18s;
}

@keyframes floatCircle {
    0% { transform: translate(0, 0) scale(1); opacity: 0.05; }
    50% { transform: translate(30px, -30px) scale(1.2); opacity: 0.12; }
    100% { transform: translate(0, 0) scale(1); opacity: 0.05; }
}

.hero__content {
    max-width: 900px;
    text-align: center;
    z-index: 1;
    animation: fadeInUp 0.8s var(--md-motion-easing-emphasized) forwards;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(40px);}
    to { opacity: 1; transform: translateY(0);}
}

.hero__avatar {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    margin: 0 auto 28px;
    box-shadow: var(--md-shadow-4);
    transition: transform var(--md-motion-duration-medium);
    overflow: hidden;
}

.hero__avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.hero__avatar:hover {
    transform: scale(1.06);
}

.hero__name {
    font-family: 'Roboto Slab', serif;
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    font-weight: 700;
    margin-bottom: 8px;
}

.hero__name .highlight {
    color: var(--md-primary);
}

.hero__tagline {
    font-size: 1.2rem;
    color: var(--md-on-surface-variant);
    margin-bottom: 24px;
}

.hero__chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 36px;
}

.md-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--border-radius-full);
    background-color: var(--md-surface-container-high);
    border: 1px solid var(--md-outline-variant);
    font-weight: 500;
    transition: all 0.2s;
}

.md-chip:hover {
    background-color: var(--md-primary-container);
    border-color: var(--md-primary);
}

.md-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--border-radius-full);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
}

.md-btn--filled {
    background-color: var(--md-primary);
    color: var(--md-on-primary);
    box-shadow: var(--md-shadow-1);
}

.md-btn--filled:hover {
    box-shadow: var(--md-shadow-3);
    transform: translateY(-2px);
}

.md-btn--outlined {
    background: transparent;
    color: var(--md-primary);
    border: 2px solid var(--md-outline-variant);
}

.md-btn--outlined:hover {
    background-color: var(--md-primary-container);
    border-color: var(--md-primary);
}

/* Sections */
.section {
    padding: 80px 24px;
    max-width: 1100px;
    margin: 0 auto;
}

.section__header {
    text-align: center;
    margin-bottom: 56px;
}

.section__label {
    background-color: var(--md-primary-container);
    padding: 6px 16px;
    border-radius: var(--border-radius-full);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    display: inline-block;
    margin-bottom: 16px;
}

.section__title {
    font-family: 'Roboto Slab', serif;
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 700;
    margin-bottom: 12px;
}

.section__subtitle {
    font-size: 1.05rem;
    color: var(--md-on-surface-variant);
    max-width: 550px;
    margin: 0 auto;
}

/* About */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.md-card {
    background-color: var(--md-surface-container-lowest);
    border-radius: var(--border-radius-lg);
    padding: 32px;
    box-shadow: var(--md-shadow-1);
    border: 1px solid var(--md-outline-variant);
    transition: var(--md-elevation-transition);
}

.md-card:hover {
    box-shadow: var(--md-shadow-3);
    transform: translateY(-4px);
}

.md-card__title {
    font-family: 'Roboto Slab', serif;
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.about-highlights {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.about-highlights li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

/* Skills */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.skill-card {
    background-color: var(--md-surface-container-lowest);
    border-radius: var(--border-radius-lg);
    padding: 24px 28px;
    border: 1px solid var(--md-outline-variant);
    transition: all 0.2s;
}

.skill-card:hover {
    box-shadow: var(--md-shadow-3);
    transform: translateY(-6px);
    border-color: var(--md-primary);
}

.skill-card__icon {
    width: 48px;
    height: 48px;
    background-color: var(--md-primary-container);
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.skill-card__name {
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: 4px;
}

.skill-card__bar-track {
    height: 6px;
    background-color: var(--md-surface-container-highest);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 8px;
}

.skill-card__bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--md-primary), #9B8E78);
    border-radius: 3px;
    transition: width 1.2s var(--md-motion-easing-emphasized);
}

/* Social Grid */
.social-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.social-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background-color: var(--md-surface-container-lowest);
    padding: 20px 24px;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--md-outline-variant);
    text-decoration: none;
    color: var(--md-on-surface);
    transition: all 0.2s;
}

.social-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--md-shadow-2);
    border-color: var(--md-primary);
    background-color: var(--md-primary-container);
}

.social-card .material-symbols-rounded {
    font-size: 2rem;
    color: var(--md-primary);
}

.social-name {
    font-weight: 600;
    font-size: 1.1rem;
    flex: 1;
}

.social-handle {
    color: var(--md-on-surface-variant);
    font-size: 0.9rem;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

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

.contact-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background-color: var(--md-surface-container-lowest);
    border-radius: var(--border-radius-md);
    border: 1px solid var(--md-outline-variant);
    text-decoration: none;
    color: var(--md-on-surface);
    transition: all 0.2s;
}

.contact-item:hover {
    background-color: var(--md-primary-container);
    border-color: var(--md-primary);
    transform: translateX(4px);
}

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

.md-input {
    position: relative;
}

.md-input input,
.md-input textarea {
    width: 100%;
    padding: 16px 18px;
    border: 2px solid var(--md-outline-variant);
    border-radius: var(--border-radius-sm);
    font-family: 'Roboto', sans-serif;
    background-color: var(--md-surface-container-lowest);
    color: var(--md-on-surface);
    transition: all 0.2s;
}

.md-input input:focus,
.md-input textarea:focus {
    border-color: var(--md-primary);
    box-shadow: 0 0 0 4px var(--md-primary-container);
    outline: none;
}

.md-input label {
    position: absolute;
    left: 16px;
    top: -11px;
    background-color: var(--md-surface-container-lowest);
    padding: 0 8px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--md-primary);
    letter-spacing: 0.03em;
}

/* Footer */
.footer {
    text-align: center;
    padding: 40px 24px;
    background-color: var(--md-surface-container);
    border-top: 1px solid var(--md-outline-variant);
}

.footer__socials {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 16px;
}

.footer__socials a {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--md-surface-container-highest);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-on-surface-variant);
    text-decoration: none;
    transition: all 0.2s;
}

.footer__socials a:hover {
    background-color: var(--md-primary-container);
    transform: translateY(-3px);
}

/* Animations */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s var(--md-motion-easing-emphasized), transform 0.7s var(--md-motion-easing-emphasized);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 768px) {
    .md-top-app-bar__nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--md-surface-container);
        padding: 12px 16px;
        border-bottom: 1px solid var(--md-outline-variant);
        border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
    }
    .md-top-app-bar__nav.open {
        display: flex;
    }
    .md-menu-btn {
        display: flex;
    }
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .hero__avatar {
        width: 110px;
        height: 110px;
    }
}

@media (max-width: 480px) {
    .skills-grid,
    .social-grid {
        grid-template-columns: 1fr;
    }
    .section {
        padding: 60px 16px;
    }
}