* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

:root {
    --color-bg: #fff;
    --color-fg: #0b0b0b;
    --color-muted: #666;
    --color-primary: #0a84ff;
    --color-danger: #b00020;
    --font-body: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 16px;
    --space-4: 24px;
    --space-5: 40px;
    --radius: 12px;
    --shadow: 0 1px 2px rgba(0,0,0,.08), 0 8px 24px rgba(0,0,0,.08);
}

body {
    font-family: var(--font-body);
    line-height: 1.5;
    color: var(--color-fg);
    background: var(--color-bg);
    padding: var(--space-3);
    max-width: 1200px;
    margin: 0 auto;
}

html {
    scroll-behavior: smooth;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid #eee;
}

.header__brand {
    font-size: 1.5rem;
    font-weight: 800;
    text-decoration: none;
    background: linear-gradient(45deg, #6b6bff, #4ea7cd, #45b7d1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.header__logo {
    font-size: 2rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

.nav__list {
    display: flex;
    list-style: none;
    gap: var(--space-2);
    margin: 0;
    padding: 0;
}

.nav__link {
    color: var(--color-fg);
    text-decoration: none;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius);
    transition: all 0.2s ease;
}

.nav__link:hover {
    color: var(--color-primary);
    background-color: rgba(10, 132, 255, 0.1);
}

.nav__link:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.nav__link--active {
    color: var(--color-primary);
    font-weight: bold;
    background-color: rgba(10, 132, 255, 0.1);
}

.breadcrumbs {
    margin-bottom: var(--space-4);
    font-size: 0.9rem;
    display: flex;
    gap: var(--space-1);
}

.breadcrumbs__link {
    color: var(--color-primary);
    text-decoration: none;
}

.breadcrumbs__link:hover {
    text-decoration: underline;
}

.breadcrumbs__link:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.breadcrumbs__current {
    color: var(--color-muted);
}

.main {
    padding: var(--space-3) 0;
}

.hero {
    background: 
        linear-gradient(to top, rgba(0,0,0,0.55), rgba(0,0,0,0.15)),
        var(--hero-bg, url("../assets/images/background_light.jpg")) center/cover no-repeat;    color: #fff;
    padding: clamp(2rem, 6vw, 6rem) var(--space-3);
    border-radius: var(--radius);
    margin: var(--space-4) 0;
}

.hero__content {
    max-width: 600px;
}

.media {
    aspect-ratio: 16/9;
    width: min(100%, 960px);
    margin-inline: auto;
    margin-block: var(--space-4);
}

.media iframe {
    width: 100%;
    height: 100%;
    border: 0;
    border-radius: var(--radius);
    display: block;
}

.gallery {
    margin: var(--space-4) 0;
}

.gallery__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-3);
    margin-top: var(--space-3);
}

.gallery__grid img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: var(--radius);
    display: block;
}

#services, #portfolio, #contacts {
    margin: var(--space-5) 0;
    padding: var(--space-3);
    border-radius: var(--radius);
}

.footer {
    margin-top: var(--space-5);
    padding-top: var(--space-4);
    border-top: 1px solid #eee;
    text-align: center;
    color: var(--color-muted);
}

.modal {
    padding: var(--space-4);
    border: none;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: min(90%, 500px);
}

.modal::backdrop {
    background: rgba(0, 0, 0, 0.5);
}

.form {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.form label {
    display: block;
    margin-bottom: var(--space-1);
    font-weight: 500;
}

.form input,
.form select,
.form textarea {
    width: 100%;
    padding: var(--space-2);
    border: 1px solid #ccc;
    border-radius: var(--radius);
    font: inherit;
}

.form input:focus,
.form select:focus,
.form textarea:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.form__actions {
    display: flex;
    gap: var(--space-2);
    margin-top: var(--space-3);
}

.button {
    padding: var(--space-2) var(--space-3);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font: inherit;
    transition: all 0.2s ease;
}

.button:hover {
    background: #0055aa;
    filter: brightness(0.95);
}

.button:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.button--secondary {
    background: var(--color-muted);
}

.button--secondary:hover {
    background: #555;
}

:where(input, select, textarea, button):focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

:disabled,
[aria-disabled="true"] {
    opacity: 0.6;
    cursor: not-allowed;
}

[aria-invalid="true"] {
    border-color: var(--color-danger);
}

@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: var(--space-2);
    }
    
    .nav__list {
        flex-direction: column;
        gap: var(--space-1);
    }
    
    .gallery__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form__actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .gallery__grid {
        grid-template-columns: 1fr;
    }
    
    body {
        padding: var(--space-2);
    }
}