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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    font-family: var(--font-primary);
    font-size: var(--font-size-body);
    font-weight: var(--font-weight-regular);
    line-height: var(--line-height-body);
    background: var(--gradient-background);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

img,
picture,
svg,
video {
    display: block;
    max-width: 100%;
}

img {
    height: auto;
}

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

ul,
ol {
    list-style: none;
}

button,
input,
textarea,
select {
    font: inherit;
}

button {
    cursor: pointer;
}

strong {
    font-weight: var(--font-weight-semibold);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--color-secondary);
    outline-offset: 4px;
}

h1,
h2,
h3,
h4 {
    color: var(--color-text);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-heading);
}

h1 {
    font-size: var(--font-size-h1);
}

h2 {
    font-size: var(--font-size-h2);
}

h3 {
    font-size: var(--font-size-h3);
}

h4 {
    font-size: var(--font-size-h4);
}

p {
    max-width: var(--content-width-text);
}

small {
    font-size: var(--font-size-small);
}

.container {
    width: min(
        calc(100% - (var(--page-padding) * 2)),
        var(--container-width)
    );

    margin-inline: auto;
}

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

.section--large {
    padding-block: var(--section-spacing-large);
}

.section--compact {
    padding-block: var(--section-spacing-compact);
}

.button {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding-inline: var(--space-5);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    cursor: pointer;
    transition:
        transform var(--transition-base),
        background-color var(--transition-base),
        border-color var(--transition-base),
        color var(--transition-base),
        box-shadow var(--transition-base);
}

.button--primary {
    background: var(--gradient-primary);
    color: #ffffff;
}

.button--primary:hover {
    transform: translateY(-2px);
    box-shadow:
        var(--shadow-sm),
        var(--shadow-glow);
}

.button--secondary {
    background: transparent;
    border-color: var(--color-border-accent);
    color: var(--color-text);
}

.button--secondary:hover {
    transform: translateY(-2px);
    background: rgba(26, 167, 255, 0.08);
    border-color: var(--color-primary);
}

.header {
    position: sticky;
    top: 0;
    z-index: var(--z-header);
    background: var(--color-third);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nav {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
}

.nav__logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
    color: var(--color-text);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.12em;
}

.nav__logo-icon {
    color: var(--color-secondary);
    display: block;
    width: 34px;
    height: 34px;
    object-fit: contain;
}

.nav__logo-text {
    white-space: nowrap;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.nav__item {
    display: flex;
    align-items: center;
}

.nav__link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    color: var(--color-muted);
    font-size: var(--font-size-small);
    font-weight: var(--font-weight-medium);
    transition:
        color var(--transition-base),
        background-color var(--transition-base),
        border-color var(--transition-base);
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-text);
}

.nav__link--cta {
        padding-inline: var(--space-4);
    background: transparent;
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-sm);
    color: var(--color-text);
}

.nav__link--cta:hover {
    background: rgba(26, 167, 255, 0.08);
    border-color: var(--color-primary);
}

.nav__menu-button {
    width: 44px;
    height: 44px;
    display: none;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 0;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 1.5rem;
    line-height: 1;
    transition:
        background-color var(--transition-base),
        border-color var(--transition-base);
}

.nav__menu-button:hover {
    background: rgba(26, 167, 255, 0.08);

    border-color: var(--color-primary);
}

.footer {
    border-top: 1px solid var(--color-border);
    background: #051741;
}

.footer__container {
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    padding-block: var(--space-6);
}

.footer__logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
    color: var(--color-text);
    font-weight: var(--font-weight-bold);
    letter-spacing: 0.12em;
}

.footer__logo-icon {
    color: var(--color-secondary);
    display: block;
    width: 34px;
    height: 34px;
    object-fit: contain;
}

.footer__logo-text {
    white-space: nowrap;
}

.footer__links {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-5);
}

.footer__link {
    color: var(--color-muted);
    font-size: var(--font-size-small);
    transition: color var(--transition-base);
}

.footer__link:hover {
    color: var(--color-text);
}

.footer__contact {
    max-width: none;
    color: var(--color-muted);
    font-size: var(--font-size-small);
}

@media (max-width: 800px) {
    .nav {
        position: relative;
    }
    .nav__menu-button {
        display: inline-flex;
    }
    .nav__list {
        position: absolute;
        top: 100%;
        right: 0;
        left: 0;
        z-index: var(--z-dropdown);
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-1);
        padding: var(--space-4);
        background: var(--color-bg);
        border: 1px solid var(--color-border);
        border-radius:
            0
            0
            var(--radius-md)
            var(--radius-md);
        box-shadow: var(--shadow-md);
    }

    .nav__list--open {
        display: flex;
    }

    .nav__item {
        width: 100%;
    }

    .nav__link {
        width: 100%;
        padding-inline: var(--space-4);
        border-radius: var(--radius-sm);
    }

    .nav__link:hover {
        background: rgba(26, 167, 255, 0.08);
    }

    .nav__link--cta {
        margin-top: var(--space-2);
        justify-content: center;
    }

    .footer__container {
        flex-direction: column;
        justify-content: center;
        text-align: center;
        padding-block: var(--space-7);
    }

}

@media (max-width: 640px) {
    :root {
        --page-padding: 16px;
        --section-spacing: var(--space-8);
        --section-spacing-large: var(--space-9);
        --section-spacing-compact: var(--space-7);
    }
    .footer__links {
        gap:
            var(--space-3)
            var(--space-5);
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}