: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);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { 
    background: var(--color-bg); 
    color: var(--color-fg); 
    font-family: var(--font-body); 
    line-height: 1.5; 
}

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

.site-header {
    background: var(--color-bg);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-muted);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header__container {
    width: min(100% - 2 * var(--space-4), 1120px);
    margin-inline: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-header__brand {
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
    color: var(--color-fg);
}

.site-nav__list {
    display: flex;
    list-style: none;
    gap: var(--space-3);
    margin: 0;
    padding: 0;
}

.site-nav__link {
    text-decoration: none;
    color: var(--color-muted);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius);
    transition: all 0.2s;
}

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

.site-nav__link--active {
    color: var(--color-primary);
    font-weight: bold;
}

.main-content {
    width: min(100% - 2 * var(--space-4), 1120px);
    margin-inline: auto;
    padding: var(--space-5) 0;
}

.section {
    padding: var(--space-5) 0;
}

.section__title {
    margin: 0 0 var(--space-3);
    font-size: 1.8rem;
}

.breadcrumbs {
    margin-bottom: var(--space-4);
}

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

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

.breadcrumbs__link:hover {
    color: var(--color-primary);
}

.breadcrumbs__current {
    color: var(--color-fg);
    font-weight: 500;
}

.site-footer {
    background: var(--color-muted);
    color: var(--color-bg);
    padding: var(--space-4) 0;
    margin-top: var(--space-5);
}

.site-footer__container {
    width: min(100% - 2 * var(--space-4), 1120px);
    margin-inline: auto;
    text-align: center;
}

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

.dialog::backdrop {
    background: rgba(0,0,0,.5);
    backdrop-filter: blur(2px);
}

.form {
    max-width: 480px;
}

.form__group {
    margin-bottom: var(--space-3);
}

.form__label {
    display: block;
    margin: 0 0 var(--space-1);
    font-weight: 500;
}

.form__input,
.form__select,
.form__textarea {
    width: 100%;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-muted);
    border-radius: var(--radius);
    font: inherit;
    transition: border-color 0.2s;
}

.form__input:focus-visible,
.form__select:focus-visible,
.form__textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-color: var(--color-primary);
}

.form__button {
    padding: var(--space-2) var(--space-3);
    border: none;
    border-radius: var(--radius);
    font: inherit;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 500;
}

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

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

.form__button:hover {
    filter: brightness(0.95);
    transform: translateY(-1px);
}

.form-actions {
    display: flex;
    gap: var(--space-2);
    margin-top: var(--space-3);
    justify-content: flex-end;
}
:where(input, select, textarea, button):focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

:disabled, [aria-disabled="true"] {
    opacity: .6;
    cursor: not-allowed;
}

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

html {
    scroll-behavior: smooth;
}

:target {
    background: rgba(10, 132, 255, 0.1);
    padding: var(--space-2);
    border-radius: var(--radius);
    transition: background-color 0.3s ease;
}

/* ===== RESPONSIVE IMAGE ===== */
.portfolio__image {
    margin-bottom: var(--space-3);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.portfolio__image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.portfolio__image img:hover {
    transform: scale(1.02);
}

/* ===== VIDEO/IFRAME with ASPECT-RATIO ===== */
.media {
    aspect-ratio: 16/9;
    width: min(100%, 960px);
    margin-inline: auto;
    margin-bottom: var(--space-4);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.media iframe,
.media video {
    width: 100%;
    height: 100%;
    border: 0;
    border-radius: var(--radius);
    background: var(--color-muted);
}

/* ===== HERO SECTION WITH BACKGROUND ===== */
.hero-section {
    background: 
        linear-gradient(135deg, rgba(10, 132, 255, 0.9) 0%, rgba(48, 64, 255, 0.8) 100%),
        url('assets/hero-bg.jpg') center/cover no-repeat;
    color: white;
    padding: clamp(3rem, 8vw, 6rem) var(--space-4);
    border-radius: var(--radius);
    margin: var(--space-4) 0;
    text-align: center;
    position: relative;
}

.hero-section__content {
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero-section h2 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    margin: 0 0 var(--space-3);
    line-height: 1.2;
    font-weight: bold;
}

.hero-section p {
    font-size: 1.2rem;
    margin: 0 0 var(--space-4);
    opacity: 0.9;
}

.hero-section__button {
    display: inline-block;
    background: white;
    color: var(--color-primary);
    padding: var(--space-3) var(--space-5);
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.hero-section__button:hover {
    background: var(--color-fg);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

/* ===== CONTACT BUTTON ===== */
.contact-button {
    background: var(--color-primary);
    color: white;
    border: none;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius);
    font: inherit;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    display: block;
    margin: var(--space-4) auto;
    box-shadow: var(--shadow);
}

.contact-button:hover {
    background: var(--color-fg);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

/* ===== PICTURE ELEMENT FOR MODERN FORMATS ===== */
.responsive-picture {
    margin: var(--space-4) 0;
}

.responsive-picture img {
    border-radius: var(--radius);
    width: 100%;
    height: auto;
}