/* ==========================================================================
   CSS Стили портфолио: Юрий Фролов (7x.by)
   Тематика: Тёмный технологичный (тёмно-синий, серый, акцентный голубой)
   ========================================================================== */

/* Импорт шрифтов */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Roboto+Mono:wght@400;500;700&display=swap');

/* Переменные */
:root {
    --bg-primary: #080c14;      /* Глубокий тёмно-синий фон */
    --bg-secondary: #0f1626;    /* Более светлый тёмно-синий для карточек */
    --bg-tertiary: #1b263b;     /* Акцентные подложки */
    --color-text: #e2e8f0;      /* Светло-серый текст */
    --color-muted: #8a99ad;     /* Серый приглушенный */
    --color-accent: #00b4d8;    /* Акцентный ярко-голубой */
    --color-accent-rgb: 0, 180, 216;
    --color-success: #10b981;   /* Зеленый для успешных статусов */
    --font-sans: 'Inter', sans-serif;
    --font-mono: 'Roboto Mono', monospace;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    --border-radius: 8px;
    --max-width: 1200px;
}

/* Сброс базовых стилей */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

input, textarea, button {
    font-family: inherit;
    outline: none;
}

/* Общие контейнеры */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Шапка сайта / Навигация */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(8, 12, 20, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    z-index: 1000;
    transition: padding var(--transition-normal), background-color var(--transition-normal);
}

.header-scrolled {
    padding: 10px 0;
    background-color: rgba(8, 12, 20, 0.95);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    color: var(--color-accent);
}

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

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
    padding: 6px 0;
    position: relative;
    color: var(--color-muted);
}

.nav-link:hover, .nav-link.active {
    color: var(--color-accent);
}

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

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

/* Кнопка мобильного меню */
.burger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1010;
}

.burger-menu span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--color-text);
    border-radius: 3px;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

/* Анимация бургера */
.burger-menu.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}

.burger-menu.active span:nth-child(2) {
    opacity: 0;
}

.burger-menu.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

/* Главный блок / Секции */
.main-content {
    padding-top: 100px;
    min-height: calc(100vh - 150px);
}

.section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-title span {
    color: var(--color-accent);
}

.section-subtitle {
    color: var(--color-muted);
    font-size: 1.1rem;
    margin-bottom: 48px;
    font-family: var(--font-mono);
}

/* Hero секция */
.hero-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
    min-height: calc(80vh - 100px);
    padding: 40px 0;
}

.hero-info {
    flex: 1;
}

.hero-tagline {
    font-family: var(--font-mono);
    color: var(--color-accent);
    font-size: 1rem;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 1.4rem;
    color: var(--color-muted);
    margin-bottom: 32px;
    font-weight: 500;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
}

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

.btn-primary:hover {
    background-color: #0096b4;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 180, 216, 0.25);
}

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

.btn-secondary:hover {
    background-color: rgba(0, 180, 216, 0.1);
    transform: translateY(-2px);
}

.hero-image-wrapper {
    flex-shrink: 0;
    position: relative;
    width: 380px;
    height: 380px;
}

.hero-image-decor {
    position: absolute;
    top: -15px;
    left: -15px;
    width: 100%;
    height: 100%;
    border: 3px dashed var(--color-accent);
    border-radius: 50%;
    animation: rotate 30s linear infinite;
    z-index: 1;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 5px; /* Сдвигает фото вниз на 20px, чтобы не срезалась макушка */
    border-radius: 50%;
    border: 6px solid var(--bg-secondary);
    position: relative;
    z-index: 2;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Карточки с краткой статистикой */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-top: 60px;
}

.stat-card {
    background-color: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: center;
    transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 180, 216, 0.3);
}

.stat-num {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.stat-text {
    font-size: 0.95rem;
    color: var(--color-muted);
}

/* Краткое превью разделов на главной */
.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.preview-card {
    background-color: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius);
    padding: 32px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.preview-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
}

.preview-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.preview-card-icon {
    width: 50px;
    height: 50px;
    background-color: rgba(0, 180, 216, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-accent);
}

.preview-card-title {
    font-size: 1.3rem;
    font-weight: 700;
}

.preview-card-desc {
    color: var(--color-muted);
    font-size: 0.95rem;
    margin-bottom: 24px;
    flex-grow: 1;
}

.preview-card-link {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-accent);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.preview-card-link:hover {
    gap: 12px;
}

/* СТРАНИЦА ОБО МНЕ */
.about-layout {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 60px;
    align-items: flex-start;
}

.about-photo-block {
    background-color: var(--bg-secondary);
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.about-photo {
    width: 100%;
    max-width: 280px;
    aspect-ratio: 1;
    border-radius: 50%;
    margin: 0 auto 24px;
    border: 4px solid var(--bg-tertiary);
    object-fit: cover;
    object-position: center 5px; /* Сдвигает фото вниз на 20px, чтобы не срезалась макушка */
}

.about-badge {
    background-color: rgba(0, 180, 216, 0.1);
    color: var(--color-accent);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 6px 16px;
    border-radius: 50px;
    display: inline-block;
    margin-bottom: 16px;
}

.about-status-list {
    text-align: left;
    list-style: none;
    margin-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 20px;
}

.about-status-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.about-status-item strong {
    color: var(--color-muted);
    font-weight: 400;
}

.about-status-item span {
    color: var(--color-text);
    font-weight: 500;
}

.about-text-block h3 {
    font-size: 1.6rem;
    margin-bottom: 20px;
    color: var(--color-accent);
}

.about-text-block p {
    margin-bottom: 20px;
    font-size: 1.05rem;
    color: var(--color-text);
    text-align: justify;
}

.about-tech-stack {
    margin-top: 40px;
}

.about-tech-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 20px;
    font-family: var(--font-mono);
    display: flex;
    align-items: center;
    gap: 10px;
}

.about-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tech-tag {
    background-color: var(--bg-tertiary);
    padding: 6px 14px;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.02);
}

.tech-tag-accent {
    background-color: rgba(0, 180, 216, 0.1);
    color: var(--color-accent);
    border: 1px solid rgba(0, 180, 216, 0.2);
}

/* СТРАНИЦА НАВЫКОВ */
.skills-intro {
    max-width: 800px;
    margin-bottom: 50px;
}

.skills-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 30px;
}

.skill-category-card {
    background-color: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius);
    padding: 30px;
    transition: transform var(--transition-normal), border-color var(--transition-normal);
}

.skill-category-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 180, 216, 0.25);
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 16px;
}

.skill-category-icon {
    width: 46px;
    height: 46px;
    background-color: rgba(0, 180, 216, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--color-accent);
    flex-shrink: 0;
}

.skill-category-title {
    font-size: 1.25rem;
    font-weight: 700;
}

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

.skill-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.skill-item i {
    color: var(--color-accent);
    margin-top: 5px;
    font-size: 0.9rem;
    flex-shrink: 0;
}

.skill-item-text {
    font-size: 0.95rem;
    color: var(--color-text);
}

/* СТРАНИЦА КОНТАКТОВ */
.contacts-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

/* СТРАНИЦА ПОРТФОЛИО (Примеры работ) */
.portfolio-category-title {
    font-size: 1.5rem;
    margin-bottom: 30px;
    font-family: var(--font-mono);
    color: var(--color-accent);
    display: flex;
    align-items: center;
    gap: 12px;
    border-left: 4px solid var(--color-accent);
    padding-left: 15px;
}

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

.portfolio-card {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.portfolio-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    border-color: rgba(0, 180, 216, 0.3);
}

.portfolio-thumb {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    background-color: #000;
}

.portfolio-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity var(--transition-normal);
}

.portfolio-card:hover .portfolio-thumb img {
    opacity: 0.7;
}

/* Оверлей для видео */
.play-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background-color: rgba(0, 180, 216, 0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.5rem;
    opacity: 0.8;
    transition: transform var(--transition-normal), opacity var(--transition-normal), background-color var(--transition-normal);
}

.portfolio-card:hover .play-overlay {
    transform: translate(-50%, -50%) scale(1.1);
    opacity: 1;
    background-color: var(--color-accent);
}

/* Модальное окно для видео (Lightbox) */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(5px);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: #fff;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    z-index: 2010;
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 1000px;
}

.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.contacts-info-block {
    display: flex;
    flex-direction: column;
    gap: 24px;
    min-width: 0; /* Предотвращает раздувание флекс-контейнера на узких экранах */
}

.contact-card {
    background-color: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius);
    padding: 24px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    min-width: 0; /* Предотвращает переполнение внутри гридов */
}

.contact-icon {
    width: 50px;
    height: 50px;
    background-color: rgba(0, 180, 216, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--color-accent);
    flex-shrink: 0;
}

.contact-details {
    min-width: 0; /* Разрешает ссылкам переносить текст */
    width: 100%;
}

.contact-details h4 {
    font-size: 1.1rem;
    margin-bottom: 6px;
}

.contact-details p {
    color: var(--color-muted);
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.contact-details a {
    color: var(--color-text);
    font-weight: 500;
    display: block;
    word-break: break-all; /* Автоматический перенос длинных ссылок на мобильных */
    overflow-wrap: break-word;
}

.contact-details a:hover {
    color: var(--color-accent);
}

.socials-block {
    margin-top: 20px;
}

.socials-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 16px;
    font-family: var(--font-mono);
}

.socials-links {
    display: flex;
    gap: 14px;
}

.social-link {
    width: 44px;
    height: 44px;
    background-color: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--color-text);
    transition: all var(--transition-normal);
}

.social-link:hover {
    background-color: var(--color-accent);
    color: var(--bg-primary);
    transform: translateY(-3px);
}

/* Форма обратной связи */
.contact-form-container {
    background-color: var(--bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.03);
    border-radius: var(--border-radius);
    padding: 40px;
}

.form-title {
    font-size: 1.5rem;
    margin-bottom: 12px;
    font-weight: 700;
}

.form-subtitle {
    color: var(--color-muted);
    font-size: 0.95rem;
    margin-bottom: 30px;
}

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

.form-label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control {
    width: 100%;
    background-color: var(--bg-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--color-text);
    padding: 12px 16px;
    border-radius: 4px;
    font-size: 0.95rem;
    transition: border-color var(--transition-normal);
}

.form-control:focus {
    border-color: var(--color-accent);
}

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

.form-status {
    margin-top: 15px;
    padding: 10px;
    border-radius: 4px;
    font-size: 0.9rem;
    display: none;
}

.form-status.success {
    display: block;
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.form-status.error {
    display: block;
    background-color: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* Кнопка "Наверх" */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 46px;
    height: 46px;
    background-color: var(--color-accent);
    color: var(--bg-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
    box-shadow: 0 5px 15px rgba(0, 180, 216, 0.3);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    background-color: #0096b4;
}

/* Футер */
.footer {
    background-color: #04060a;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 40px 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.footer-logo {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 700;
}

.footer-logo span {
    color: var(--color-accent);
}

.footer-text {
    color: var(--color-muted);
    font-size: 0.9rem;
}

/* АНИМАЦИИ ПРИ СКРОЛЛЕ (Scroll-driven Animations с помощью IntersectionObserver) */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* Медиа-запросы (Адаптивность) */
@media (max-width: 992px) {
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-section {
        flex-direction: column;
        text-align: center;
        gap: 40px;
        justify-content: center;
    }
    
    .hero-btns {
        justify-content: center;
    }

    .about-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-photo-block {
        max-width: 450px;
        margin: 0 auto;
        width: 100%;
    }

    .contacts-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 1.8rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }

    .hero-image-wrapper {
        width: 280px;
        height: 280px;
    }

    /* Мобильное меню */
    .burger-menu {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background-color: var(--bg-secondary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 40px;
        z-index: 1005;
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
        transition: right var(--transition-normal);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-btns {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }

    .skills-categories-grid {
        grid-template-columns: 1fr;
    }

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

    .contact-form-container {
        padding: 24px;
    }
}