:root {
    --max: 1280px;
    --text: #0f172a;
    --muted: #64748b;
    --border: #e2e8f0;
    --blue: #2563eb;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--text);
    background: #fff;
    font-family: var(--font-main, 'IRANSansX', Tahoma, Arial, sans-serif);
    line-height: 1.8;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

body.irh3-menu-open {
    overflow: hidden;
}

img,
svg {
    max-width: 100%;
}

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

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

.container {
    width: min(calc(100% - 2rem), var(--max));
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: 9999;
    border-radius: 10px;
    padding: 10px 14px;
    color: #fff;
    background: #13213d;
    transform: translateY(-180%);
    transition: transform .18s ease;
}

.skip-link:focus {
    transform: none;
}

.placeholder {
    min-height: 62vh;
    padding: 6rem 0;
}

.placeholder h1 {
    margin: 0;
    font-size: clamp(2rem, 6vw, 4rem);
}

.placeholder p {
    max-width: 720px;
    color: var(--muted);
}

.domain-form {
    display: flex;
    max-width: 650px;
    gap: .75rem;
}

.domain-form input {
    flex: 1;
    border: 1px solid var(--border);
    border-radius: .7rem;
    padding: .85rem;
}

.domain-form button {
    border: 0;
    border-radius: .7rem;
    padding: .85rem 1.25rem;
    color: #fff;
    background: var(--blue);
    cursor: pointer;
}

@media (max-width: 900px) {
    .domain-form {
        flex-direction: column;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}