@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600;700&display=swap');

:root {
    --bg-primary: #171717;
    --bg-secondary: #222222;
    --text-primary: #f8f8f8;
    --text-secondary: #b3b3b3;
    --python-blue: #3776AB;
    --python-yellow: #FFD43B;
    --accent-color: #e9c46a;
    --border-color: #333;
    --shadow-color: rgba(0, 0, 0, 0.2);
    --nav-hover-bg-dark: rgba(255, 212, 59, 0.2);
    --nav-hover-text-dark: var(--python-yellow);
    --card-shadow-initial: 0 5px 20px rgba(0, 0, 0, 0.15);
    --card-shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.3);
    --btn-primary-bg: rgba(255, 212, 59, 0.2);
    --btn-primary-bg-hover: var(--python-yellow);
    --btn-secondary-bg: rgba(34, 34, 34, 0.6);
    --btn-secondary-bg-hover: var(--bg-secondary);
    --btn-text-color: var(--text-primary);
    --btn-shadow-initial: 0 4px 15px rgba(0, 0, 0, 0.15);
    --btn-shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.35);
    --tag-color: var(--python-yellow);
    --tech-tag-bg: #333333;
    --tech-tag-color: #f8f8f8;
    --toggle-border-color: #555;
    --toggle-icon-color: var(--text-primary);
    --toggle-thumb-bg: var(--python-yellow);
}

body[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f0f0f0;
    --text-primary: #333333;
    --text-secondary: #666666;
    --python-blue: #0077B6;
    --python-yellow: #FFC300;
    --accent-color: #8338ec;
    --border-color: #e0e0e0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --nav-hover-bg-light: rgba(55, 118, 171, 0.15);
    --nav-hover-text-light: var(--python-blue);
    --card-shadow-initial: 0 5px 20px rgba(0, 0, 0, 0.08);
    --card-shadow-hover: 0 10px 30px rgba(0, 0, 0, 0.15);
    --btn-primary-bg: rgba(0, 119, 182, 0.15);
    --btn-primary-bg-hover: var(--python-blue);
    --btn-secondary-bg: rgba(240, 240, 240, 0.6);
    --btn-secondary-bg-hover: var(--bg-secondary);
    --btn-text-color: var(--text-primary);
    --btn-shadow-initial: 0 4px 15px rgba(0, 0, 0, 0.08);
    --btn-shadow-hover: 0 8px 25px rgba(0, 0, 0, 0.15);
    --tag-color: var(--python-blue);
    --tech-tag-bg: #e8e8e8;
    --tech-tag-color: #333333;
    --toggle-border-color: #bbb;
    --toggle-icon-color: var(--text-primary);
    --toggle-thumb-bg: var(--python-blue);
}

.social-icon,
.skill-icon[src*='flask.svg'],
.skill-icon[src*='sqla.svg'],
.hero-avatar,
.terminal-code {
    filter: invert(1);
    transition: filter 0.5s ease;
}

body[data-theme="light"] .logo-icon,
body[data-theme="light"] .skill-icon,
body[data-theme="light"] .social-icon,
body[data-theme="light"] .terminal-code,
body[data-theme="light"] .project-icon-img,
body[data-theme="light"] .hero-avatar {
    filter: none;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: -apple-system, "San Francisco Text Pro", "Montserrat", "Segoe UI", "Roboto", sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.5s ease, color 0.5s ease;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.header-main {
    background-color: rgba(34, 34, 34, 0.8);
    padding: 10px 40px;
    position: sticky;
    top: 20px;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    backdrop-filter: blur(10px);
    border-radius: 50px;
    box-shadow: 0 4px 20px var(--shadow-color);
    transition: background-color 0.5s ease, box-shadow 0.3s ease;
}

body[data-theme="light"] .header-main {
    background-color: rgba(240, 240, 240, 0.8);
}

.nav-main {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-brand {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: color 0.3s ease;
}

.logo-icon {
    width: 35px;
    height: 35px;
    transition: transform 0.5s ease;
}

.nav-brand:hover .logo-icon {
    transform: rotate(360deg);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 10px;
}

.nav-item {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 10px 15px;
    border-radius: 50px;
    transition: background-color 0.3s ease, color 0.3s ease;
    position: relative;
    z-index: 1;
    display: flex;
    align-items: center;
    gap: 8px;
}

@media (pointer: fine) {
    body[data-theme="dark"] .nav-item:hover {
        color: var(--nav-hover-text-dark);
        background-color: var(--nav-hover-bg-dark);
    }

    body[data-theme="light"] .nav-item:hover {
        color: var(--nav-hover-text-light);
        background-color: var(--nav-hover-bg-light);
    }
}

.theme-toggle-button {
    background: transparent;
    border: 2px solid var(--toggle-border-color);
    width: 60px;
    height: 30px;
    border-radius: 50px;
    position: relative;
    cursor: pointer;
    transition: border-color 0.3s ease;
    padding: 0;
}

@media (pointer: fine) {
    body[data-theme="dark"] .theme-toggle-button:hover {
        border-color: var(--python-yellow);
    }

    body[data-theme="light"] .theme-toggle-button:hover {
        border-color: var(--python-blue);
    }
}

.toggle-icon-wrapper {
    position: absolute;
    top: 50%;
    left: 4px;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: left 0.3s ease-in-out;
}

.toggle-icon-wrapper i {
    position: absolute;
    font-size: 14px;
    transition: opacity 0.3s ease, transform 0.3s ease, color 0.3s ease;
}

.toggle-icon-sun {
    opacity: 1;
    color: var(--python-yellow);
}

.toggle-icon-moon {
    opacity: 0;
    color: var(--text-primary);
}

body[data-theme="light"] .theme-toggle-button {
    border-color: var(--toggle-border-color);
}
body[data-theme="light"] .toggle-icon-wrapper {
    left: 35px;
}
body[data-theme="light"] .toggle-icon-sun {
    opacity: 0;
}
body[data-theme="light"] .toggle-icon-moon {
    opacity: 1;
    color: var(--python-blue);
}

.card-item {
    background-color: var(--bg-secondary);
    border-radius: 20px;
    box-shadow: var(--card-shadow-initial);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    padding: 30px;
}

@media (pointer: fine) {
    .card-item:hover {
        transform: translateY(-5px);
        box-shadow: var(--card-shadow-hover);
    }
}

.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.is-visible .section-header {
    opacity: 1;
    transform: translateY(0);
}

.section-tag {
    font-size: 14px;
    font-weight: 600;
    color: var(--tag-color);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 10px;
}

.hero-section {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    min-height: 80vh;
    padding-top: 85px;
    animation: fadeIn 1s ease forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content {
    flex: 1;
    text-align: left;
}

.hero-title {
    font-size: 60px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    white-space: normal;
}

.hero-subtitle {
    font-size: 19px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.hero-actions {
    display: flex;
    gap: 20px;
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-avatar {
    width: 100%;
    max-width: 400px;
    height: auto;
    display: block;
    filter: invert(1);
    transition: filter 0.5s ease;
}

.btn {
    padding: 15px 35px;
    border: none;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    transition: all 0.3s ease-in-out, transform 0.3s ease-in-out;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    color: var(--btn-text-color);
    box-shadow: var(--btn-shadow-initial);
    position: relative;
    overflow: hidden;
    border-radius: 30px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 300%;
    height: 300%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
    transition: all 0.5s ease-in-out;
    transform: translate(-50%, -50%) scale(0);
    opacity: 0;
    border-radius: 50%;
    z-index: 0;
}

@media (pointer: fine) {
    .btn:hover::before {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }

    .btn:hover {
        transform: translateY(-5px);
        box-shadow: var(--btn-shadow-hover);
    }

    .btn-primary:hover {
        background-color: var(--btn-primary-bg-hover);
        color: var(--text-primary);
    }

    .btn-secondary:hover {
        background-color: var(--btn-secondary-bg-hover);
        color: var(--text-primary);
    }

    .btn-contact:hover {
        background-color: var(--btn-primary-bg-hover);
        color: var(--text-primary);
    }
}

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

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

.btn-contact {
    margin-bottom: 30px;
    background-color: var(--btn-primary-bg);
}

.about-content {
    display: flex;
    align-items: center;
    gap: 60px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.is-visible .about-content {
    opacity: 1;
    transform: translateY(0);
}

.about-photo-wrapper {
    width: 100%;
    max-width: 400px;
    overflow: hidden;
    border-radius: 15px;
    box-shadow: var(--card-shadow-initial);
}

.about-photo {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 15px;
    transition: transform 0.5s ease;
}

@media (pointer: fine) {
    .about-photo:hover {
        transform: scale(1.03);
    }
}

.about-text-card {
    flex: 1;
}

.about-text-card p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    justify-items: center;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.is-visible .skills-grid {
    opacity: 1;
    transform: translateY(0);
}

.skill-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

@media (pointer: fine) {
    .skill-card:hover {
        transform: translateY(-5px);
        box-shadow: var(--card-shadow-hover);
    }
}

.skill-icon {
    width: 60px;
    height: 60px;
}

.skill-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section.is-visible .projects-grid {
    opacity: 1;
    transform: translateY(0);
}

.project-card {
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease;
}

@media (pointer: fine) {
    .project-card:hover {
        transform: translateY(-5px);
    }
}

.project-icon-wrapper {
    width: 60px;
    height: 60px;
    margin-bottom: 20px;
}

.project-icon-img {
    width: 100%;
    height: 100%;
}

.project-header {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
}

.project-tag {
    font-size: 12px;
    font-weight: 600;
    color: var(--tag-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 5px;
}

.project-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}

.project-description {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.project-tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: auto;
    margin-bottom: 20px;
}

.tech-hashtag {
    padding: 8px 15px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    transition: background-color 0.3s ease, color 0.3s ease, transform 0.3s ease;
    background-color: var(--tech-tag-bg);
    color: var(--tech-tag-color);
    border: 1px solid transparent;
}

@media (pointer: fine) {
    .tech-hashtag:hover {
        transform: translateY(-2px) scale(1.02);
        background-color: var(--tag-color);
        color: var(--text-primary);
        border-color: var(--tag-color);
    }
}

body[data-theme="dark"] .tech-hashtag {
    background-color: #333333;
    color: var(--text-primary);
    border-color: #444444;
}

body[data-theme="light"] .tech-hashtag {
    background-color: #e8e8e8;
    color: var(--text-primary);
    border-color: #d0d0d0;
}

.project-links {
    display: flex;
    gap: 20px;
    margin-top: 20px;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 14px;
    color: var(--tag-color);
}

@media (pointer: fine) {
    .project-link:hover {
        color: var(--text-primary);
    }
}

.contact-content {
    text-align: center;
}

.contact-content p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.social-links-big {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.social-item {
    transition: transform 0.3s ease;
}

@media (pointer: fine) {
    .social-item:hover {
        transform: scale(1.1);
    }
}

.social-icon {
    width: 60px;
    height: 60px;
}

.footer-main {
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 14px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.footer-main p {
    margin-bottom: 0;
}

.footer-clock {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.footer-clock i {
    color: var(--tag-color);
}

@keyframes heart-beat {
    0% {
        transform: scale(1);
    }
    15% {
        transform: scale(1.1);
    }
    30% {
        transform: scale(1);
    }
    45% {
        transform: scale(1.1);
    }
    60% {
        transform: scale(1);
    }
    75% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

.heart-beat {
    color: var(--tag-color);
    animation-name: heart-beat;
    animation-duration: 1.5s;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.lang-toggle-button {
    --button-bg: var(--background-secondary);
    --button-border: var(--border-color);
    --active-flag-scale: 1.2;
    --inactive-flag-scale: 0.8;
    --flag-opacity: 0.7;
    position: relative;
    width: 100px;
    height: 40px;
    border: 2px solid var(--button-border);
    border-radius: 20px;
    background-color: var(--button-bg);
    cursor: pointer;
    transition: background-color 0.3s ease, border-color 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 0 10px;
}

.lang-label-flag {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    z-index: 3;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.lang-label-flag img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 50%;
}

.lang-toggle-button:not(.active) .lang-label-flag[data-lang="ru"] {
    transform: scale(var(--active-flag-scale));
    opacity: 1;
}

.lang-toggle-button:not(.active) .lang-label-flag[data-lang="en"] {
    transform: scale(var(--inactive-flag-scale));
    opacity: var(--flag-opacity);
}

.lang-toggle-button.active .lang-label-flag[data-lang="en"] {
    transform: scale(var(--active-flag-scale));
    opacity: 1;
}

.lang-toggle-button.active .lang-label-flag[data-lang="ru"] {
    transform: scale(var(--inactive-flag-scale));
    opacity: var(--flag-opacity);
}

body[data-theme="light"] .lang-toggle-button {
    --button-border: #ccc;
}

.typing-effect {
    border-right: .15em solid var(--tag-color);
}

.typed-text-finished {
    border-right: .15em solid var(--tag-color);
    animation: blink-caret .75s step-end infinite;
}

@keyframes blink-caret {
    from, to {
        border-color: transparent;
    }
    50% {
        border-color: var(--tag-color);
    }
}

.fa-python,
.fa-square-binary,
.fa-spinner {
    height: 1em;
    width: auto;
    vertical-align: middle;
    color: var(--tag-color);
}

.terminal-code {
    display: inline-block;
    font-family: 'Fira Code', 'Roboto Mono', monospace;
    font-size: 0.9em;
    background-color: #1e1e1e;
    color: #f0f0f0;
    padding: 2px 6px;
    border-radius: 4px;
    white-space: nowrap;
    vertical-align: middle;
}

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

.terminal-code .paren {
    color: #ffd700;
}

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

.project-image-container {
    width: 100%;
    height: 200px;
    overflow: hidden;
    border-radius: 10px;
    margin-bottom: 20px;
}

.project-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

@media (pointer: fine) {
    .project-card:hover .project-image {
        transform: scale(1.05);
    }
}

@media (max-width: 992px) {
    .header-main {
        flex-wrap: wrap;
        border-radius: 0;
        top: 0;
        padding: 15px 20px;
        flex-direction: column;
        align-items: center;
        max-width: 100%;
    }

    .nav-main {
        flex-direction: column;
        align-items: center;
        gap: 15px;
        width: 100%;
        margin-top: 15px;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        width: 100%;
    }

    .nav-item {
        font-size: 13px;
        padding: 8px 12px;
    }

    .header-actions {
        width: 100%;
        justify-content: center;
    }

    .hero-section {
        flex-direction: column;
        text-align: center;
        padding-top: 40px;
        align-items: center;
        gap: 40px; /* Добавил отступ между блоками */
    }

    .hero-content {
        max-width: 100%;
        text-align: center;
    }
    
    .hero-title {
        font-size: 40px;
    }

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

    .hero-actions {
        flex-direction: column;
        gap: 15px;
        width: 100%;
        align-items: center;
    }

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

    .section {
        padding: 40px 0;
        text-align: center;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .section-title {
        font-size: 32px;
    }

    .about-content {
        flex-direction: column;
        gap: 40px;
        align-items: center;
    }

    .about-photo-wrapper {
        width: 90%;
        max-width: 400px;
        box-shadow: none;
    }

    .about-photo {
        border-radius: 15px;
    }
    
    .about-text-card {
        text-align: center;
    }

    .about-text-card p {
        text-align: center;
    }

    .skills-grid {
        grid-template-columns: repeat(2, minmax(100px, 1fr));
        gap: 20px;
        justify-items: center;
    }

    .skill-card {
        align-items: center;
    }

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

    .project-card {
        align-items: center;
        text-align: center;
    }

    .project-header {
        align-items: center;
    }

    .project-description {
        text-align: center;
    }

    .project-tech-stack {
        justify-content: center;
    }

    .project-links {
        justify-content: center;
    }

    .tech-hashtag {
        font-size: 11px;
    }

    .social-links-big {
        flex-wrap: wrap;
        gap: 20px;
        justify-content: center;
    }

    .social-icon {
        width: 45px;
        height: 45px;
    }

    .footer-main {
        padding: 20px 0;
    }
}

@media (max-width: 600px) {
    .header-main {
        padding: 10px 15px;
    }

    .nav-brand {
        font-size: 20px;
    }

    .logo-icon {
        width: 30px;
        height: 30px;
    }

    .lang-toggle-button {
        width: 80px;
        height: 35px;
    }
}