/* CSS Variables */
:root {
    --color-bg: #FAFAFA;
    --color-bg-white: #FFFFFF;
    --color-text: #2D3436;
    --color-text-muted: #636E72;
    --color-accent: #E07A5F;
    --color-accent-hover: #C86A4F;
    --color-border: #DFE6E9;

    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-size-base: 18px;
    --line-height: 1.6;

    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;
    --spacing-xxl: 120px;

    --container-max: 1200px;
    --border-radius: 8px;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.12);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height);
    color: var(--color-text);
    background-color: var(--color-bg);
}

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

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.3;
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

h4 {
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-muted);
}

p {
    margin-bottom: var(--spacing-sm);
}

p:last-child {
    margin-bottom: 0;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    cursor: pointer;
    border: none;
}

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

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

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

.btn-secondary:hover {
    background-color: var(--color-accent);
    color: white;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

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

.nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav a {
    color: var(--color-text);
    font-weight: 500;
    font-size: 0.95rem;
}

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

.lang-switch {
    border: 1.5px solid var(--color-border);
    border-radius: 4px;
    padding: 2px 10px;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    color: var(--color-text-muted) !important;
    transition: border-color 0.2s ease, color 0.2s ease;
}

.lang-switch:hover {
    border-color: var(--color-accent);
    color: var(--color-accent) !important;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: all 0.3s ease;
}

/* Section */
.section {
    padding: var(--spacing-xl) 0;
}

.section-intro {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 800px;
    margin-bottom: var(--spacing-lg);
}

/* Hero */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, #FFF 0%, #F8F4F2 100%);
}

.hero-content {
    max-width: 800px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* About */
.about {
    background-color: var(--color-bg-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-photo img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.project-card {
    background: var(--color-bg-white);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    box-shadow: var(--shadow);
    transition: box-shadow 0.2s ease;
}

.project-card:hover {
    box-shadow: var(--shadow-hover);
}

.project-header {
    margin-bottom: var(--spacing-sm);
}

.project-header h3 {
    margin-bottom: var(--spacing-xs);
}

.project-type {
    display: inline-block;
    font-size: 0.875rem;
    color: var(--color-accent);
    font-weight: 500;
}

.project-details {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: var(--border-radius);
}

.project-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.project-stats span {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    background: var(--color-bg);
    padding: 6px 12px;
    border-radius: 100px;
}

.project-link {
    display: inline-block;
    font-weight: 500;
}

.project-link::after {
    content: ' \2192';
}

/* Articles */
.articles {
    background-color: var(--color-bg-white);
}

.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.article-card {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.article-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow);
}

.article-card h3 {
    font-size: 1.1rem;
    line-height: 1.4;
}

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

.article-link {
    display: inline-block;
    margin-top: var(--spacing-sm);
    font-weight: 500;
}

.article-link::after {
    content: ' \2192';
}

/* Channel / Gallery */
.channel-btn {
    margin-bottom: var(--spacing-lg);
}

.gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.gallery-item {
    display: block;
    border-radius: var(--border-radius);
    overflow: hidden;
    aspect-ratio: 4/3;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

/* Debug Camp */
.debug-camp {
    background-color: var(--color-bg-white);
}

.debug-camp-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.debug-camp-content .btn {
    margin-top: var(--spacing-md);
}

.debug-camp-photo img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

/* Contacts */
.contacts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.contact-item {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: border-color 0.2s ease;
}

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

.contact-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.contact-value {
    font-weight: 500;
    color: var(--color-text);
}

/* Footer */
.footer {
    padding: var(--spacing-lg) 0;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--color-border);
}

/* Media Queries */
@media (min-width: 768px) {
    .about-grid {
        grid-template-columns: 1fr 300px;
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .gallery {
        grid-template-columns: repeat(3, 1fr);
    }

    .debug-camp-grid {
        grid-template-columns: 1fr 350px;
    }

    .contacts-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .about-grid {
        grid-template-columns: 1fr 400px;
    }

    .debug-camp-grid {
        grid-template-columns: 1fr 450px;
    }
}

@media (max-width: 767px) {
    :root {
        --font-size-base: 16px;
    }

    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-bg-white);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--spacing-lg);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .nav.active {
        opacity: 1;
        visibility: visible;
    }

    .nav a {
        font-size: 1.25rem;
    }

    .hero {
        min-height: auto;
        padding: 120px 0 var(--spacing-xl);
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-buttons .btn {
        text-align: center;
    }

    .section {
        padding: var(--spacing-lg) 0;
    }

    .project-card {
        padding: var(--spacing-sm);
    }
}

/* Menu toggle animation */
.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}