/* --- CSS Variables & Theming --- */
:root {
    /* Dark Theme (Default) */
    --bg-primary: #0a0a15;
    --bg-secondary: #111120;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --accent-cyan: #06b6d4;
    --accent-purple: #ec4899;
    --border-color: #1e293b;
    --hover-bg: #1e293b;
    --accent-nginx: #20c997;
    --accent-bs: #dc3545;
}

/* --- Global Reset & Base --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Manrope', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color 0.2s ease, color 0.2s ease;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
    letter-spacing: -0.02em;
}

.mono {
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

ul {
    list-style: none;
}

/* --- Utilities --- */
.text-accent-cyan { color: var(--accent-cyan); }
.text-accent-purple { color: var(--accent-purple); }
.border-accent { border-color: var(--accent-cyan) !important; }

/* --- Header --- */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: background-color 0.2s ease, border-color 0.2s ease, backdrop-filter 0.2s ease;
}

.navbar-brand {
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--text-primary);
    letter-spacing: -0.05em;
}

.navbar-brand.nbb {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 0px solid;
    border-radius: 8px;
    padding: 0.7rem;
    color: var(--text-primary);
}
.navbar-nav.nbni {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 0px solid;
    border-radius: 8px;
    padding: 0.5rem;
    justify-content: center;
    padding-right: 2rem;
}

.navbar-toggler {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 0px solid !important;
    border-radius: 8px;
    padding: 0.7rem;
    color: var(--text-primary);
}

.navbar-brand span {
    color: var(--accent-cyan);
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
    margin-left: 1.5rem;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -4px;
    left: 0;
    background-color: var(--accent-cyan);
    transition: width 0.2s ease;
}

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

/* --- Hero Section --- */
.hero-section {
    padding-top: 140px;
    padding-bottom: 80px;
    min-height: 90vh;
    display: flex;
    align-items: center;
    position: relative;  /* Для позиционирования псевдоэлемента */
    background-image: 
        linear-gradient(to right, var(--border-color) 1px, transparent 1px),
        linear-gradient(to bottom, var(--border-color) 1px, transparent 1px);
    background-size: 24px 24px;
    background-position: center;
    overflow: hidden;  /* Чтобы градиент не вылезал */
}

/* Псевдоэлемент для затухания сетки */
.hero-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 16%;  /* Высота зоны затухания */
    background: linear-gradient(
        to bottom,
        transparent 1%,
        var(--bg-primary) 90%,
        var(--bg-primary) 100%
    );
    background: linear-gradient(
        to bottom,
        transparent 0%,
        rgba(10, 10, 21, 0.3) 30%,
        rgba(10, 10, 21, 0.7) 70%,
        var(--bg-primary) 100%
    );
    pointer-events: none;  /* Чтобы не блокировал клики */
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 2.5rem;
}

.btn-primary-custom {
    background-color: var(--accent-cyan);
    color: #fff;
    border: 1px solid var(--accent-cyan);
    padding: 0.8rem 2rem;
    font-weight: 600;
    border-radius: 4px;
    display: inline-block;
    transition: all 0.2s ease;
}

.btn-primary-custom:hover {
    background-color: transparent;
    color: var(--accent-cyan);
}

.btn-outline-custom {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.8rem 2rem;
    font-weight: 600;
    border-radius: 4px;
    display: inline-block;
    margin-left: 1rem;
    transition: all 0.2s ease;
}

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

/* --- Projects Section --- */
.section-header {
    margin-bottom: 3rem;
    border-left: 4px solid var(--accent-purple);
    padding-left: 1rem;
}

.section-title {
    font-size: 2.5rem;
    color: var(--text-primary);
}

.project-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    height: 100%;
    transition: transform 0.2s ease, border-color 0.2s ease;
    display: flex;
    flex-direction: column;
}

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

.card-image-placeholder {
    height: 200px;
    background-color: var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-family: 'Fira Code', monospace;
    font-size: 0.8rem;
}

.img-macadamy {
    width: 100%;
    height: 12.5rem;
    background-image: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), 
                      url("/static/img/macadamy_site.png");
    background-size: cover;      /* Растягивает по всей области */
    background-position: center; /* Центрирует */
    background-repeat: no-repeat;
    border-radius: 8px;
}
.img-portfolio {
    width: 100%;
    height: 12.5rem;
    background-image: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), 
                      url("/static/img/portfolio_site.png");
    background-size: cover;      /* Растягивает по всей области */
    background-position: left; /* Центрирует */
    background-repeat: no-repeat;
    border-radius: 8px;
}
.img-go { 
    background: linear-gradient(135deg, var(--border-color) 25%, var(--bg-secondary) 25%, var(--bg-secondary) 50%, var(--border-color) 50%, var(--border-color) 75%, var(--bg-secondary) 75%, var(--bg-secondary) 100%); 
    background-size: 20px 20px; 
}
.img-vecxor { 
    background: radial-gradient(circle, var(--border-color) 2px, transparent 2.5px); 
    background-size: 20px 20px; 
    background-color: var(--bg-secondary); 
}

.card-body {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.card-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tech-badge {
    font-family: 'Fira Code', monospace;
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
}

.tech-badge.fe {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.tech-badge.nginx {
    border-color: var(--accent-nginx);
    color: var(--accent-nginx);
}

.tech-badge.bootstrap {
    border-color: var(--accent-bs);
    color: var(--accent-bs);
}

.tech-badge.purple {
    border-color: var(--accent-purple);
    color: var(--accent-purple);
}

.card-link {
    color: var(--accent-cyan);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

/* --- Contacts Section --- */
.contacts-section {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.contact-box {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact-btn-large {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background-color: var(--accent-cyan);
    color: #fff;
    padding: 1rem 2.5rem;
    border-radius: 4px;
    font-weight: 700;
    font-size: 1.1rem;
    margin-top: 2rem;
    transition: background-color 0.2s;
}

.social-icons {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    gap: 1.5rem;
}

.social-icon {
    font-size: 1.5rem;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.social-icon:hover {
    color: var(--text-primary);
}

/* --- Footer --- */
footer {
    padding: 2rem 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .hero-title { font-size: 2.5rem; }
    .navbar-collapse {
        margin-top: 1rem;
        border-radius: 4px;
    }
    .nav-link { margin: 0.5rem 0; display: block; }
    .theme-toggle { margin: 0.5rem 0 0 0; }
    .btn-outline-custom { margin-left: 0; margin-top: 1rem; display: block; width: 100%; text-align: center; }
    .btn-primary-custom { display: block; width: 100%; text-align: center; }
}

/* Анимация появления */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Для пользователей с prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    .reveal {
        transition: none;
        opacity: 1 !important;
        transform: none !important;
    }
}

.tech-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;  /* Центрирует элементы по горизонтали */
}
.tech-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    transition: border-color 0.2s;
}

/* Python — двухцветный как в логотипе */
.tech-item.py {
    border-color: #FFD43B;
    color: #306998;
}

/* Django — официальный зелёный */
.tech-item.django {
    border-color: #092E20;
    color: #44B78B;
}

/* Go — циан */
.tech-item.go {
    border-color: #00ADD8;
    color: #00ADD8;
}

/* HTML/CSS — оранжевый (цвет HTML5) */
.tech-item.htmlcss {
    border-color: #E34F26;
    color: #E34F26;
}

/* Bootstrap — фиолетовый */
.tech-item.bootstrap {
    border-color: #7952B3;
    color: #7952B3;
}

/* Nginx — зелёный */
.tech-item.nginx {
    border-color: #009639;
    color: #009639;
}

/* Hover-эффект (единый для всех) */
.tech-item:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transition: border-color 0.2s, color 0.2s;
}

.tech-item:hover {
    border-color: var(--accent-cyan);
}

@media (max-width: 576px) {
    .tech-grid {
        justify-content: center;
        gap: 0.75rem;
    }
    .tech-item {
        font-size: 0.85rem;
        padding: 0.4rem 0.8rem;
    }
}

/* Уведомление о копировании */
.copy-notification {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #50C878;
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 600;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 2000;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 12px #50C878;
}

.copy-notification.show {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Анимация иконки при копировании */
.social-icon.copying i {
    animation: pulse 0.3s ease;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}