/* ========== CSS Variables (Design System) ========== */
:root {
    /* Цвета */
    --color-page-bg: #121212;
    --color-surface: #212121;
    --color-surface-alt: #1a1a1a;

    --color-accent: #00724f;
    --color-accent-soft: #00a06d;

    --color-border-subtle: #333333;
    --color-shadow-soft: rgba(0, 0, 0, 0.7);

    --color-text-main: #f5f5f5;
    --color-text-muted: #bdbdbd;
    --color-text-accent: #a5ffd6;

    /* Типографика */
    --font-family-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-size-base: 16px;
    --font-size-title: 28px;
    --font-size-subtitle: 15px;
    --font-size-menu-title: 18px;
    --font-size-menu-desc: 14px;
    --font-size-footer: 12px;

    /* Отступы и радиусы */
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-pill: 999px;

    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 15px;
    --space-lg: 24px;
    --space-xl: 15px;

    /* Анимации */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.25s ease-out;
}

/* ========== Global Reset / Base ========== */

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

html {
background-color: #050505;
}

body {
    height: 100vh;
    font-family: var(--font-family-base), sans-serif;
    font-size: var(--font-size-base);
    color: var(--color-text-main);
    background: radial-gradient(circle at top, #1f4136 0, #121212 50%, #050505 100%);
    background-repeat: no-repeat;
    background-size: cover;
}

.container {
    max-width: 1170px;
    width: 100%;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    color: inherit;
    text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-accent-soft);
    outline-offset: 3px;
}

.main {
    max-width: 1920px;
    width: 100%;
    margin: 0 auto;
    padding-bottom: 40px;
}

.btn {
    appearance: none;
    border: 0;
    padding: 12px 18px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
    transition: transform .07s ease, box-shadow .2s ease;
}

.btn_accent {
    background: var(--color-accent);
    color: white;
    box-shadow: 0 8px 18px rgba(0, 114, 79, 0.4);
}

.btn_secondary {
    background: #1f1f1f;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border-subtle);
}



/* ========== Menu ========== */

.menu {
    max-width: 700px;
    margin: 0 auto;
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    background: radial-gradient(circle at top left, #263636 0, #212121 40%, #151515 100%);
    border: 1px solid var(--color-border-subtle);
    box-shadow:
            0 30px 70px rgba(0, 0, 0, 0.9),
            0 0 0 1px rgba(255, 255, 255, 0.02);
}

.menu_list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.menu_link {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 14px 18px;
    border-radius: var(--radius-lg);
    background: linear-gradient(
            135deg,
            rgba(0, 114, 79, 0.22),
            rgba(0, 0, 0, 0.6)
    );
    border: 1px solid rgba(0, 114, 79, 0.7);
    box-shadow:
            0 10px 25px rgba(0, 0, 0, 0.8),
            0 0 0 1px rgba(255, 255, 255, 0.03);
    cursor: pointer;
    transition:
            transform var(--transition-normal),
            box-shadow var(--transition-normal),
            border-color var(--transition-fast),
            background var(--transition-fast);
    position: relative;
    overflow: hidden;
}

/* Лёгкий градиент/блик при наведении */
.menu_link::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(
            circle at top left,
            rgba(255, 255, 255, 0.14),
            transparent 55%
    );
    opacity: 0;
    transition: opacity var(--transition-normal);
    pointer-events: none;
}

.menu_link_title {
    font-size: var(--font-size-menu-title);
    font-weight: 600;
}

.menu_link_desc {
    font-size: var(--font-size-menu-desc);
    color: var(--color-text-muted);
}

/* Hover / active */
.menu_link:hover {
    transform: translateY(-2px) scale(1.01);
    box-shadow:
            0 18px 36px rgba(0, 0, 0, 0.9),
            0 0 0 1px rgba(255, 255, 255, 0.04);
    border-color: var(--color-accent-soft);
    background: linear-gradient(
            135deg,
            rgba(0, 160, 109, 0.22),
            rgba(0, 0, 0, 0.7)
    );
}

.menu_link:hover::before {
    opacity: 1;
}

.menu_link:active {
    transform: translateY(0) scale(0.99);
    box-shadow:
            0 8px 18px rgba(0, 0, 0, 0.9),
            0 0 0 1px rgba(255, 255, 255, 0.02);
}