/*
 * پایهٔ طراحی عمومی HUNTX و متغیرهای مشترک ظاهر.
 * مؤلفه‌های قابل استفادهٔ مجدد در components و سبک اختصاصی صفحات در pages نگهداری می‌شوند.
 */
@font-face {
    font-family: 'Inter';
    src: url('../fonts/inter/InterVariable.woff2') format('woff2');
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
}
@font-face {
    font-family: 'Inter';
    src: url('../fonts/inter/InterVariable-Italic.woff2') format('woff2');
    font-style: italic;
    font-weight: 100 900;
    font-display: swap;
}
@font-face {
    font-family: 'Flight Sans';
    src: url('../fonts/lato/Lato-Regular.ttf') format('truetype');
    font-style: normal;
    font-weight: 400;
    font-display: swap;
}
@font-face {
    font-family: 'Flight Sans';
    src: url('../fonts/lato/Lato-Bold.ttf') format('truetype');
    font-style: normal;
    font-weight: 700 900;
    font-display: swap;
}
@font-face {
    font-family: 'Flight Display';
    src: url('../fonts/noto-serif-display/NotoSerifDisplay-Regular.ttf') format('truetype');
    font-style: normal;
    font-weight: 400 600;
    font-display: swap;
}
@font-face {
    font-family: 'Flight Display';
    src: url('../fonts/noto-serif-display/NotoSerifDisplay-Bold.ttf') format('truetype');
    font-style: normal;
    font-weight: 700 900;
    font-display: swap;
}

:root {
    color-scheme: light;
    --font-sans:
        'Flight Sans', Lato, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Flight Display', 'Noto Serif Display', Georgia, 'Times New Roman', serif;
    --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
    --container-sm: 42rem;
    --container-md: 64rem;
    --container-lg: 76rem;
    --container-xl: 90rem;
    --header-height: 3.75rem;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
    --space-8: 4rem;
    --radius-xs: 0.375rem;
    --radius-sm: 0.55rem;
    --radius-md: 0.8rem;
    --radius-lg: 1.1rem;
    --radius-xl: 1.5rem;
    --radius-pill: 999px;
    --shadow-sm: 0 1px 2px rgb(24 18 38 / 0.07);
    --shadow-panel: 0 1.25rem 3.5rem rgb(39 24 71 / 0.09);
    --shadow-popover: 0 1rem 2.75rem rgb(23 14 43 / 0.18);
    --transition-fast: 140ms ease;
    --transition-normal: 220ms ease;
}

/* در بازدید نخست، نبود data-theme باعث اعمال ترجیح سیستم‌عامل می‌شود. */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        color-scheme: dark;

        --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.22);
        --shadow-panel: 0 1.25rem 3.5rem rgb(0 0 0 / 0.28);
        --shadow-popover: 0 1rem 2.75rem rgb(0 0 0 / 0.42);
    }
}

html:lang(en) {
    --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: var(--font-sans);
}

html[data-theme='light'] {
    color-scheme: light;
}
html[data-theme='dark'] {
    color-scheme: dark;

    --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.22);
    --shadow-panel: 0 1.25rem 3.5rem rgb(0 0 0 / 0.28);
    --shadow-popover: 0 1rem 2.75rem rgb(0 0 0 / 0.42);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}
html {
    min-height: 100%;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}
body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    text-rendering: optimizeLegibility;
}
body.is-modal-open {
    overflow: hidden;
}
img,
svg,
video {
    display: block;
    max-width: 100%;
}
img {
    height: auto;
}
:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}
::selection {
    color: #fff;
    background: var(--color-primary);
}
[hidden] {
    display: none !important;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
blockquote {
    margin-top: 0;
}
h1,
h2,
h3,
h4 {
    color: var(--color-heading);
    font-family: var(--font-display);
    font-weight: 600;
    letter-spacing: -0.02em;
}
h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.08;
}
h2 {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    line-height: 1.18;
}
h3 {
    font-size: clamp(1.15rem, 2vw, 1.4rem);
    line-height: 1.3;
}
p {
    margin-bottom: 1rem;
}
a {
    color: var(--color-primary);
    text-decoration-thickness: 0.08em;
    text-underline-offset: 0.18em;
}
a:hover {
    color: var(--color-primary-hover);
}
hr {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: var(--space-6) 0;
}
code,
kbd {
    font-family: var(--font-mono);
    font-size: 0.9em;
    border-radius: var(--radius-xs);
    background: var(--color-code-bg);
}
code {
    padding: 0.15rem 0.4rem;
}
kbd {
    padding: 0.2rem 0.45rem;
    border: 1px solid var(--color-border);
}

.container,
.page-shell {
    width: min(100% - 2rem, var(--container-lg));
    margin-inline: auto;
}
.container--sm {
    width: min(100% - 2rem, var(--container-sm));
    margin-inline: auto;
}
.container--xl {
    width: min(100% - 2rem, var(--container-xl));
    margin-inline: auto;
}
.page-shell {
    padding-block: clamp(1.5rem, 4vw, 3rem) clamp(3rem, 7vw, 6rem);
}
.section {
    padding-block: clamp(3rem, 7vw, 6rem);
}
.section--tight {
    padding-block: clamp(2rem, 5vw, 3.5rem);
}
.section-heading {
    max-width: 46rem;
    margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}
.eyebrow {
    margin-bottom: 0.6rem;
    color: var(--color-primary);
    font-size: 0.78rem;
    font-weight: 850;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}
.lead {
    color: var(--color-muted);
    font-size: clamp(1.02rem, 2vw, 1.18rem);
}
.muted {
    color: var(--color-muted) !important;
}

.skip-link {
    position: fixed;
    inset-inline-start: 1rem;
    top: 0.75rem;
    z-index: 1000;
    transform: translateY(-180%);
    padding: 0.65rem 0.9rem;
    border-radius: var(--radius-sm);
    color: #fff;
    background: var(--color-primary);
    transition: transform var(--transition-fast);
}
.skip-link:focus {
    transform: translateY(0);
}

.sr-only:not(:focus-within),
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}

.sr-only:focus-within {
    position: fixed;
    inset-block-start: 0.75rem;
    inset-inline-start: 1rem;
    z-index: 1000;
    max-width: calc(100vw - 2rem);
    max-height: calc(100dvh - 1.5rem);
    overflow: auto;
    padding: 0.65rem 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    background: var(--color-surface);
}

@media (max-width: 48rem) {
    .container,
    .page-shell,
    .container--sm,
    .container--xl {
        width: min(100% - 1.25rem, var(--container-lg));
    }
}
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}