@font-face {
    font-family: "Vazirmatn";
    src: url("../fonts/Vazirmatn-Variable.f6d31671339d.woff2") format("woff2");
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
}

:root {
    color-scheme: light;
    --ink-950: #10152d;
    --ink-900: #111a3a;
    --ink-800: #19254b;
    --ink-700: #29365d;
    --ink-600: #4c5877;
    --ink-500: #66718c;
    --paper: #f8f9fc;
    --surface: #ffffff;
    --surface-soft: #f0f3f8;
    --line: #dce1eb;
    --line-strong: #c5ccda;
    --cyan-700: #067d87;
    --cyan-600: #0898a4;
    --cyan-500: #13b7be;
    --cyan-100: #dff7f7;
    --cyan-50: #effcfc;
    --gold-700: #9a6500;
    --gold-500: #e1a52d;
    --gold-100: #fff0c9;
    --violet-500: #6d62d8;
    --success: #087a50;
    --success-soft: #e5f7ef;
    --warning: #a45f00;
    --warning-soft: #fff3da;
    --danger: #b4233c;
    --danger-soft: #fff0f2;
    --info: #2a5ca8;
    --info-soft: #edf5ff;
    --shadow-sm: 0 8px 20px rgba(18, 26, 55, .07);
    --shadow-md: 0 18px 48px rgba(18, 26, 55, .12);
    --shadow-lg: 0 30px 80px rgba(18, 26, 55, .16);
    --radius-sm: .65rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    --container: 74rem;
    --header-height: 4.75rem;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 1rem);
}

body {
    margin: 0;
    min-width: 20rem;
    background: var(--paper);
    color: var(--ink-900);
    font-family: "Vazirmatn", Tahoma, Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.8;
    text-rendering: optimizeLegibility;
}

body::selection { background: var(--cyan-100); color: var(--ink-950); }

a { color: var(--cyan-700); text-decoration-thickness: .08em; text-underline-offset: .2em; }
a:hover { color: var(--ink-900); }
button, input, select, textarea { font: inherit; }
fieldset { min-inline-size: 0; border: 1px solid var(--line); border-radius: var(--radius-md); padding: 1rem; }
legend { color: var(--ink-950); padding-inline: .35rem; font-size: 1.12rem; font-weight: 800; }
button, a { -webkit-tap-highlight-color: transparent; }
img, video { display: block; max-inline-size: 100%; }
h1, h2, h3, h4, p, ul, ol, dl { margin-block-start: 0; }
h1, h2, h3, h4 { color: var(--ink-950); line-height: 1.35; text-wrap: balance; }
h1 { font-size: clamp(2rem, 5vw, 4.3rem); letter-spacing: -.045em; }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.55rem); letter-spacing: -.03em; }
h3 { font-size: clamp(1.08rem, 2vw, 1.35rem); }
code, pre, kbd, samp, .ltr-token {
    direction: ltr;
    unicode-bidi: isolate;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
code { border-radius: .35rem; background: #e9edf5; padding: .1em .35em; font-size: .9em; }
pre { overflow: auto; border: 1px solid #2d385b; border-radius: var(--radius-md); background: #11182f; color: #eaf0ff; padding: 1rem; line-height: 1.65; white-space: pre-wrap; }

:focus-visible { outline: 3px solid var(--gold-500); outline-offset: 3px; }

.sr-only {
    position: absolute !important;
    inline-size: 1px !important;
    block-size: 1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
}

.skip-link {
    position: fixed;
    inset-block-start: .75rem;
    inset-inline-start: 1rem;
    z-index: 1000;
    transform: translateY(-180%);
    border-radius: .65rem;
    background: var(--ink-950);
    color: #fff;
    padding: .65rem 1rem;
}
.skip-link:focus { transform: translateY(0); color: #fff; }

.container { inline-size: min(100% - 2rem, var(--container)); margin-inline: auto; }
.narrow { inline-size: min(100%, 44rem); }
.stack > * + * { margin-block-start: var(--stack-space, 1rem); }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; }
.split { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.muted { color: var(--ink-600); }
.kicker { margin-block-end: .75rem; color: var(--cyan-700); font-weight: 700; letter-spacing: .02em; }
.lead { color: var(--ink-600); font-size: clamp(1.05rem, 2vw, 1.25rem); line-height: 1.95; }
.eyebrow { display: inline-flex; align-items: center; gap: .45rem; margin-block-end: 1rem; color: var(--cyan-700); font-size: .9rem; font-weight: 700; }
.eyebrow::before { content: ""; inline-size: 1.5rem; block-size: 2px; background: currentColor; }
.demo-badge { display: inline-flex; align-items: center; gap: .35rem; border: 1px solid #d8bc75; border-radius: 999px; background: #fff9e9; color: #795208; padding: .25rem .65rem; font-size: .78rem; font-weight: 700; white-space: nowrap; }

.page-grid {
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    opacity: .42;
    background-image: linear-gradient(rgba(34, 53, 91, .028) 1px, transparent 1px), linear-gradient(90deg, rgba(34, 53, 91, .028) 1px, transparent 1px);
    background-size: 2.5rem 2.5rem;
    mask-image: linear-gradient(to bottom, #000, transparent 75%);
}

.announcement-bar { background: var(--ink-950); color: #eef3ff; font-size: .88rem; }
.announcement-bar__inner { display: flex; align-items: center; justify-content: center; gap: .65rem; min-block-size: 2.4rem; text-align: center; }
.status-dot { display: inline-block; flex: 0 0 .55rem; inline-size: .55rem; block-size: .55rem; border-radius: 50%; background: #42d19b; box-shadow: 0 0 0 .25rem rgba(66, 209, 155, .15); }

.site-header {
    position: sticky;
    inset-block-start: 0;
    z-index: 100;
    border-block-end: 1px solid rgba(197, 204, 218, .7);
    background: rgba(248, 249, 252, .9);
    backdrop-filter: blur(18px);
}
.site-header__inner { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: clamp(1rem, 3vw, 2.5rem); min-block-size: var(--header-height); }
.brand { display: inline-flex; align-items: center; gap: .75rem; color: var(--ink-950); text-decoration: none; }
.brand:hover { color: var(--ink-950); }
.brand__copy { display: grid; line-height: 1.4; }
.brand__copy strong { font-size: 1.03rem; }
.brand__copy small { color: var(--ink-500); font-size: .72rem; }
.brand__mark { position: relative; display: grid; grid-template-columns: repeat(3, .55rem); align-items: end; gap: .22rem; inline-size: 2.15rem; block-size: 2.15rem; border-radius: .72rem; background: var(--ink-950); padding: .42rem; box-shadow: inset 0 0 0 1px rgba(255,255,255,.14); }
.brand__mark i { display: block; border-radius: 999px; background: var(--cyan-500); }
.brand__mark i:nth-child(1) { block-size: .48rem; }
.brand__mark i:nth-child(2) { block-size: 1.28rem; background: var(--gold-500); }
.brand__mark i:nth-child(3) { block-size: .86rem; }
.primary-nav { display: flex; align-items: center; gap: clamp(.5rem, 1.6vw, 1.4rem); }
.primary-nav a { border-radius: .55rem; color: var(--ink-700); padding: .4rem .2rem; text-decoration: none; font-size: .92rem; font-weight: 600; white-space: nowrap; }
.primary-nav a:hover { color: var(--cyan-700); }
.nav-mobile-action { display: none; }
.site-actions { display: flex; align-items: center; justify-content: flex-end; gap: .6rem; }
.user-chip { display: flex; align-items: center; gap: .55rem; border-radius: 999px; color: var(--ink-800); padding: .25rem .35rem .25rem .7rem; text-decoration: none; font-size: .88rem; font-weight: 600; }
.user-chip__avatar { display: grid; place-items: center; inline-size: 2.15rem; block-size: 2.15rem; border-radius: 50%; background: var(--cyan-100); color: var(--cyan-700); }
.nav-toggle { display: none; border: 0; background: transparent; padding: .65rem; }
.nav-toggle > span:not(.sr-only) { display: block; inline-size: 1.4rem; block-size: 2px; margin-block: .25rem; border-radius: 2px; background: var(--ink-900); transition: transform .2s ease, opacity .2s ease; }

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .55rem;
    min-block-size: 2.85rem;
    border: 1px solid transparent;
    border-radius: .8rem;
    padding: .62rem 1.1rem;
    cursor: pointer;
    font-weight: 700;
    text-decoration: none;
    transition: transform .16s ease, box-shadow .16s ease, background .16s ease, border-color .16s ease;
}
.button:hover { transform: translateY(-1px); }
.button--primary { background: var(--ink-950); color: #fff; box-shadow: 0 8px 18px rgba(16, 21, 45, .18); }
.button--primary:hover { background: var(--cyan-700); color: #fff; box-shadow: 0 12px 24px rgba(6, 125, 135, .22); }
.button--accent { background: var(--cyan-600); color: #fff; }
.button--accent:hover { background: var(--cyan-700); color: #fff; }
.button--quiet { border-color: var(--line); background: rgba(255,255,255,.65); color: var(--ink-800); }
.button--quiet:hover { border-color: var(--cyan-600); color: var(--cyan-700); }
.button--danger { border-color: #f2bec7; background: var(--danger-soft); color: var(--danger); }
.button--small { min-block-size: 2.4rem; padding: .45rem .8rem; font-size: .86rem; }
.button--wide { inline-size: 100%; }
.button[disabled], .button[aria-disabled="true"] { cursor: not-allowed; opacity: .55; transform: none; box-shadow: none; }
.icon-button { display: grid; place-items: center; min-inline-size: 2.5rem; min-block-size: 2.5rem; border: 0; border-radius: .65rem; background: transparent; color: currentColor; cursor: pointer; font-size: 1.35rem; }
.text-link { display: inline-flex; align-items: center; gap: .35rem; font-weight: 700; text-decoration: none; }
.text-link::after { content: "←"; transition: transform .16s ease; }
.text-link:hover::after { transform: translateX(-.25rem); }

.toast-region { position: fixed; inset-block-start: calc(var(--header-height) + .75rem); inset-inline: 0; z-index: 110; pointer-events: none; }
.toast-region .alert { max-inline-size: 40rem; margin-inline-start: auto; box-shadow: var(--shadow-md); pointer-events: auto; }
.alert { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); padding: .9rem 1rem; }
.alert p:last-child { margin-block-end: 0; }
.alert--success { border-color: #a8ddc8; background: var(--success-soft); color: #075c3d; }
.alert--error, .alert--danger { border-color: #efb4bf; background: var(--danger-soft); color: #8a172b; }
.alert--warning { border-color: #eccf91; background: var(--warning-soft); color: #804a00; }
.alert--info { border-color: #b9d1f3; background: var(--info-soft); color: #204b8c; }

.site-footer { margin-block-start: 6rem; border-block-start: 1px solid var(--line); background: var(--ink-950); color: #bfc7dc; }
.site-footer__grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 3rem; padding-block: 4rem 3rem; }
.site-footer h2 { margin-block-end: .9rem; color: #fff; font-size: .95rem; }
.site-footer p { max-inline-size: 30rem; }
.site-footer nav { display: grid; align-content: start; gap: .6rem; }
.site-footer a { color: #c9d1e4; text-decoration: none; }
.site-footer a:hover { color: #fff; }
.brand--footer { margin-block-end: 1rem; }
.brand--footer .brand__copy strong { color: #fff; }
.brand--footer .brand__copy small { color: #aab4cf; }
.site-footer__status p { display: flex; align-items: center; gap: .6rem; }
.site-footer__bottom { display: flex; justify-content: space-between; gap: 1rem; border-block-start: 1px solid rgba(255,255,255,.09); padding-block: 1.25rem; color: #929db9; font-size: .82rem; }

.page-hero { position: relative; overflow: hidden; padding-block: clamp(3.5rem, 8vw, 7.5rem); }
.page-hero::after { content: ""; position: absolute; z-index: -1; inset-block-start: -12rem; inset-inline-end: -12rem; inline-size: 34rem; block-size: 34rem; border: 1px solid rgba(19, 183, 190, .22); border-radius: 50%; box-shadow: 0 0 0 4rem rgba(19,183,190,.035), 0 0 0 9rem rgba(19,183,190,.025); }
.page-hero__grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(18rem, .8fr); align-items: center; gap: clamp(2.5rem, 7vw, 7rem); }
.page-hero h1 { max-inline-size: 15ch; margin-block-end: 1.4rem; }
.page-hero__actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-block: 2rem 1.25rem; }
.trust-list { display: flex; flex-wrap: wrap; gap: .6rem 1.2rem; margin: 0; padding: 0; list-style: none; color: var(--ink-600); font-size: .88rem; }
.trust-list li { display: flex; align-items: center; gap: .4rem; }
.trust-list li::before { content: "✓"; display: grid; place-items: center; inline-size: 1.15rem; block-size: 1.15rem; border-radius: 50%; background: var(--cyan-100); color: var(--cyan-700); font-size: .75rem; font-weight: 900; }
.algorithm-visual { position: relative; min-block-size: 28rem; border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius-xl); background: radial-gradient(circle at 75% 20%, rgba(19,183,190,.28), transparent 33%), linear-gradient(150deg, var(--ink-900), #152a4d 72%, #0b666f); box-shadow: var(--shadow-lg); color: #fff; padding: clamp(1.4rem, 4vw, 2.2rem); isolation: isolate; }
.algorithm-visual::before { content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit; opacity: .18; background-image: linear-gradient(rgba(255,255,255,.15) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.15) 1px, transparent 1px); background-size: 2.7rem 2.7rem; }
.algorithm-visual__label { color: #9ee7e6; font-size: .84rem; }
.algorithm-visual__title { max-inline-size: 14ch; margin-block: .6rem 1.6rem; color: #fff; font-size: 1.7rem; }
.path-diagram { position: relative; display: grid; gap: 1rem; margin-block-start: 2rem; }
.path-diagram::before { content: ""; position: absolute; inset-block: 1.25rem; inset-inline-start: 1.2rem; inline-size: 2px; background: linear-gradient(var(--cyan-500), var(--gold-500)); }
.path-node { position: relative; display: grid; grid-template-columns: 2.4rem 1fr auto; align-items: center; gap: .8rem; border: 1px solid rgba(255,255,255,.15); border-radius: .85rem; background: rgba(255,255,255,.08); padding: .75rem; backdrop-filter: blur(6px); }
.path-node__number { z-index: 1; display: grid; place-items: center; inline-size: 2.4rem; block-size: 2.4rem; border-radius: .7rem; background: var(--cyan-500); color: var(--ink-950); font-weight: 900; }
.path-node:nth-child(3) .path-node__number { background: var(--gold-500); }
.path-node small { color: #b8c4de; }
.path-node > span:last-child { color: #85e3dd; font-size: .8rem; }

.section { padding-block: clamp(3.5rem, 7vw, 6.5rem); }
.section--soft { border-block: 1px solid var(--line); background: var(--surface-soft); }
.section--dark { overflow: hidden; background: var(--ink-950); color: #c9d1e5; }
.section--dark h2, .section--dark h3 { color: #fff; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-block-end: 2.25rem; }
.section-heading > div { max-inline-size: 46rem; }
.section-heading p { margin-block-end: 0; color: var(--ink-600); }
.section--dark .section-heading p { color: #aeb9d3; }
.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.cards__empty { grid-column: 1 / -1; }
.card { position: relative; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-sm); padding: clamp(1.1rem, 2.5vw, 1.6rem); }
.card--interactive { transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.card--interactive:hover { transform: translateY(-4px); border-color: #b7d9db; box-shadow: var(--shadow-md); }
.card--tinted { background: linear-gradient(145deg, #fff, var(--cyan-50)); }
.card--dark { border-color: rgba(255,255,255,.12); background: rgba(255,255,255,.065); color: #d5dbeb; box-shadow: none; }
.card--dark h3 { color: #fff; }
.card__head { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-block-end: 1rem; }
.card__icon { display: grid; place-items: center; inline-size: 2.75rem; block-size: 2.75rem; border-radius: .8rem; background: var(--cyan-100); color: var(--cyan-700); font-size: 1.2rem; font-weight: 900; }
.card__footer { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-block-start: 1.2rem; padding-block-start: 1rem; border-block-start: 1px solid var(--line); }
.tag-list { display: flex; flex-wrap: wrap; gap: .45rem; margin: 0; padding: 0; list-style: none; }
.tag { display: inline-flex; align-items: center; min-block-size: 1.9rem; border-radius: 999px; background: var(--surface-soft); color: var(--ink-700); padding: .2rem .65rem; font-size: .78rem; font-weight: 600; }
.tag--cyan { background: var(--cyan-100); color: #075e66; }
.tag--gold { background: var(--gold-100); color: #7b5100; }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .75rem; }
.metric { border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); padding: 1rem; }
.metric strong { display: block; color: var(--ink-950); font-size: 1.55rem; line-height: 1.35; }
.metric span { color: var(--ink-600); font-size: .8rem; }

.package-card { display: flex; min-block-size: 100%; flex-direction: column; }
.package-card__level { display: flex; align-items: center; gap: .5rem; margin-block-end: .75rem; color: var(--cyan-700); font-size: .8rem; font-weight: 700; }
.package-card__level::before { content: ""; inline-size: .6rem; block-size: .6rem; border-radius: 50%; background: var(--cyan-500); }
.package-card h3 { margin-block-end: .6rem; }
.package-card__facts { display: grid; grid-template-columns: repeat(2, 1fr); gap: .55rem; margin-block: 1.1rem; padding: 0; list-style: none; }
.package-card__facts li { border-radius: .7rem; background: var(--surface-soft); padding: .6rem .7rem; color: var(--ink-600); font-size: .78rem; }
.package-card__facts strong { display: block; color: var(--ink-800); font-size: .9rem; }
.price { display: flex; align-items: baseline; gap: .3rem; color: var(--ink-950); }
.price strong { font-size: clamp(1.25rem, 3vw, 1.7rem); font-variant-numeric: tabular-nums; }
.price span { color: var(--ink-600); font-size: .82rem; }

.breadcrumbs { padding-block: 1rem; color: var(--ink-500); font-size: .82rem; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: .45rem; margin: 0; padding: 0; list-style: none; }
.breadcrumbs li { display: flex; align-items: center; gap: .45rem; }
.breadcrumbs li:not(:last-child)::after { content: "/"; color: var(--line-strong); }
.breadcrumbs a { color: var(--ink-600); text-decoration: none; }

.subpage-header { padding-block: 2.5rem 2rem; }
.subpage-header__inner { display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem; }
.subpage-header h1 { margin-block-end: .7rem; font-size: clamp(2rem, 4vw, 3.5rem); }
.subpage-header p { max-inline-size: 48rem; margin-block-end: 0; color: var(--ink-600); }
.filter-shell { display: grid; grid-template-columns: 17rem minmax(0, 1fr); align-items: start; gap: 1.5rem; }
.filter-panel { position: sticky; inset-block-start: calc(var(--header-height) + 1rem); border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); padding: 1.25rem; }
.filter-panel h2 { font-size: 1.1rem; }
.filter-panel__group { padding-block: 1rem; border-block-start: 1px solid var(--line); }
.filter-panel__group:first-of-type { border-block-start: 0; }
.filter-panel__group > label { display: block; margin-block-end: .45rem; color: var(--ink-950); font-weight: 700; }
.filter-panel input, .filter-panel select { inline-size: 100%; min-block-size: 2.75rem; border: 1px solid var(--line-strong); border-radius: .7rem; background: #fff; padding-inline: .7rem; color: var(--ink-800); }
.filter-toggle { display: none; }
.check-row { display: flex; align-items: flex-start; gap: .6rem; margin-block: .45rem; color: var(--ink-700); font-size: .88rem; }
.check-row input { margin-block-start: .35rem; accent-color: var(--cyan-700); }
.result-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-block-end: 1rem; }
.result-toolbar p { margin: 0; color: var(--ink-600); }

.form-shell { display: grid; grid-template-columns: minmax(0, 1fr) minmax(18rem, .72fr); overflow: hidden; max-inline-size: 66rem; margin: 3rem auto; border: 1px solid var(--line); border-radius: var(--radius-xl); background: var(--surface); box-shadow: var(--shadow-md); }
.form-shell__main { padding: clamp(1.5rem, 5vw, 3.5rem); }
.form-shell__aside { position: relative; overflow: hidden; background: var(--ink-950); color: #c9d2e8; padding: clamp(1.5rem, 4vw, 3rem); }
.form-shell__aside::before { content: ""; position: absolute; inset: 0; opacity: .14; background-image: linear-gradient(rgba(255,255,255,.17) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.17) 1px, transparent 1px); background-size: 2.5rem 2.5rem; }
.form-shell__aside > * { position: relative; }
.form-shell__aside h2 { color: #fff; }
.auth-heading { margin-block-end: 2rem; }
.auth-heading h1 { margin-block-end: .5rem; font-size: clamp(1.8rem, 4vw, 2.5rem); }
.auth-heading p { color: var(--ink-600); }
.form-field { margin-block-end: 1.15rem; }
.form-field__label { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-block-end: .4rem; }
.form-field label { color: var(--ink-800); font-size: .88rem; font-weight: 700; }
.optional-label { color: var(--ink-500); font-size: .72rem; }
.form-field input:not([type="checkbox"]):not([type="radio"]), .form-field select, .form-field textarea,
.input {
    inline-size: 100%;
    min-block-size: 3rem;
    border: 1px solid var(--line-strong);
    border-radius: .75rem;
    background: #fff;
    color: var(--ink-950);
    padding: .65rem .8rem;
    transition: border-color .15s ease, box-shadow .15s ease;
}
.form-field textarea { min-block-size: 8rem; resize: vertical; }
.form-field input:focus, .form-field select:focus, .form-field textarea:focus, .input:focus { border-color: var(--cyan-700); box-shadow: 0 0 0 4px rgba(8, 152, 164, .12); }
.form-field--error input, .form-field--error select, .form-field--error textarea { border-color: var(--danger); }
.form-field__help { margin-block-start: .35rem; color: var(--ink-500); font-size: .78rem; }
.form-field__errors { margin: .35rem 0 0; padding-inline-start: 1.2rem; color: var(--danger); font-size: .78rem; }
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; margin-block-start: 1.5rem; }
.otp-inputs { direction: ltr; display: grid; grid-template-columns: repeat(6, minmax(2.6rem, 1fr)); gap: .5rem; }
.otp-inputs input { min-inline-size: 0; block-size: 3.4rem; border: 1px solid var(--line-strong); border-radius: .7rem; text-align: center; font-size: 1.2rem; }
.auth-links { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; margin-block-start: 1.2rem; font-size: .88rem; }
.security-list { margin: 1.5rem 0 0; padding: 0; list-style: none; }
.security-list li { display: flex; gap: .65rem; margin-block: .9rem; }
.security-list li::before { content: "✓"; color: #72ded3; font-weight: 900; }

.dashboard-layout { display: grid; grid-template-columns: 15rem minmax(0, 1fr); min-block-size: calc(100vh - var(--header-height)); }
.dashboard-sidebar { border-inline-end: 1px solid var(--line); background: #f2f4f8; padding: 1.35rem 1rem; }
.dashboard-sidebar nav { position: sticky; inset-block-start: calc(var(--header-height) + 1rem); display: grid; gap: .3rem; }
.dashboard-sidebar a { display: flex; align-items: center; gap: .65rem; border-radius: .7rem; color: var(--ink-700); padding: .62rem .75rem; text-decoration: none; font-size: .88rem; font-weight: 600; }
.dashboard-sidebar a:hover, .dashboard-sidebar a[aria-current="page"] { background: var(--surface); color: var(--cyan-700); box-shadow: var(--shadow-sm); }
.dashboard-main { min-inline-size: 0; padding: clamp(1.25rem, 4vw, 3rem); }
.dashboard-header { display: flex; align-items: flex-start; justify-content: space-between; gap: 1.5rem; margin-block-end: 2rem; }
.dashboard-header h1 { margin-block-end: .4rem; font-size: clamp(1.65rem, 3.5vw, 2.6rem); }
.dashboard-header p { margin: 0; color: var(--ink-600); }
.dashboard-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: 1.1rem; }
.span-12 { grid-column: span 12; }
.span-8 { grid-column: span 8; }
.span-7 { grid-column: span 7; }
.span-6 { grid-column: span 6; }
.span-5 { grid-column: span 5; }
.span-4 { grid-column: span 4; }
.next-action { overflow: hidden; border: 0; background: linear-gradient(125deg, var(--ink-950), #173c57 68%, #087d87); color: #dfe6f6; }
.next-action::after { content: ""; position: absolute; inset-block-start: -3rem; inset-inline-end: -3rem; inline-size: 13rem; block-size: 13rem; border: 1px solid rgba(255,255,255,.14); border-radius: 50%; box-shadow: 0 0 0 2rem rgba(255,255,255,.035), 0 0 0 4.5rem rgba(255,255,255,.025); }
.next-action h2, .next-action h3 { color: #fff; }
.next-action > * { position: relative; z-index: 1; }
.next-action .button { margin-block-start: 1rem; background: #fff; color: var(--ink-950); }
.progress-bar { overflow: hidden; block-size: .65rem; border-radius: 999px; background: #e3e7ef; }
.progress-bar > span { display: block; inline-size: var(--progress, 0%); block-size: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--cyan-600), var(--cyan-500)); }
.progress-bar--gold > span { background: linear-gradient(90deg, var(--gold-700), var(--gold-500)); }
.progress-meta { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-block: .55rem 0; color: var(--ink-600); font-size: .8rem; }
.activity-list { margin: 0; padding: 0; list-style: none; }
.activity-list li { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: .75rem; padding-block: .85rem; border-block-end: 1px solid var(--line); }
.activity-list li:last-child { border: 0; }
.activity-dot { inline-size: .72rem; block-size: .72rem; border-radius: 50%; background: var(--cyan-500); box-shadow: 0 0 0 .3rem var(--cyan-100); }
.activity-list small { color: var(--ink-500); }

.data-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); }
.data-table { inline-size: 100%; border-collapse: collapse; font-size: .87rem; }
.data-table th, .data-table td { padding: .85rem 1rem; text-align: start; vertical-align: middle; border-block-end: 1px solid var(--line); }
.data-table th { background: #f0f3f8; color: var(--ink-700); font-size: .78rem; white-space: nowrap; }
.data-table tbody tr:hover { background: var(--cyan-50); }
.data-table tbody tr:last-child td { border-block-end: 0; }
.status { display: inline-flex; align-items: center; gap: .4rem; border-radius: 999px; background: var(--surface-soft); color: var(--ink-700); padding: .25rem .6rem; font-size: .76rem; font-weight: 700; white-space: nowrap; }
.status::before { content: ""; inline-size: .45rem; block-size: .45rem; border-radius: 50%; background: currentColor; }
.status--success, .status--solved, .status--paid { background: var(--success-soft); color: var(--success); }
.status--warning, .status--attempted, .status--pending { background: var(--warning-soft); color: var(--warning); }
.status--danger, .status--failed { background: var(--danger-soft); color: var(--danger); }
.status--info, .status--planned { background: var(--info-soft); color: var(--info); }
.status--review { background: #f1efff; color: #594cb7; }

.detail-layout { display: grid; grid-template-columns: minmax(0, 1fr) 21rem; align-items: start; gap: 1.5rem; }
.sticky-summary { position: sticky; inset-block-start: calc(var(--header-height) + 1rem); }
.detail-hero { overflow: hidden; border-block-end: 1px solid var(--line); background: radial-gradient(circle at 15% 0, rgba(19,183,190,.12), transparent 34%), var(--surface); padding-block: 2.5rem 3.5rem; }
.detail-hero__grid { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(18rem, .7fr); align-items: center; gap: 3rem; }
.detail-hero h1 { margin-block: .65rem 1rem; font-size: clamp(2rem, 4.5vw, 3.7rem); }
.detail-visual { display: grid; place-items: center; min-block-size: 17rem; border-radius: var(--radius-xl); background: linear-gradient(145deg, var(--ink-950), #124f61); box-shadow: var(--shadow-md); color: #fff; }
.detail-visual__glyph { position: relative; display: grid; place-items: center; inline-size: 9rem; block-size: 9rem; border: 1px solid rgba(255,255,255,.3); border-radius: 50%; font-size: 3rem; }
.detail-visual__glyph::before, .detail-visual__glyph::after { content: ""; position: absolute; inline-size: 1.4rem; block-size: 1.4rem; border-radius: .4rem; background: var(--cyan-500); }
.detail-visual__glyph::before { inset-block-start: -.7rem; }
.detail-visual__glyph::after { inset-block-end: -.7rem; background: var(--gold-500); }
.fact-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: .6rem; margin-block-start: 1.5rem; }
.fact-strip div { border-inline-start: 2px solid var(--cyan-500); padding-inline-start: .7rem; }
.fact-strip strong { display: block; }
.fact-strip span { color: var(--ink-600); font-size: .76rem; }
.content-section { padding-block: 1.5rem; }
.content-section + .content-section { border-block-start: 1px solid var(--line); }
.content-section h2 { font-size: 1.5rem; }
.check-list { margin: 0; padding: 0; list-style: none; }
.check-list li { position: relative; margin-block: .65rem; padding-inline-start: 1.75rem; }
.check-list li::before { content: "✓"; position: absolute; inset-inline-start: 0; inset-block-start: .15rem; display: grid; place-items: center; inline-size: 1.25rem; block-size: 1.25rem; border-radius: 50%; background: var(--cyan-100); color: var(--cyan-700); font-size: .72rem; font-weight: 900; }
.curriculum-list { margin: 0; padding: 0; list-style: none; counter-reset: module; }
.curriculum-list > li { counter-increment: module; display: grid; grid-template-columns: auto 1fr auto; gap: 1rem; padding-block: 1rem; border-block-end: 1px solid var(--line); }
.curriculum-list > li::before { content: counter(module, decimal-leading-zero); display: grid; place-items: center; inline-size: 2.7rem; block-size: 2.7rem; border-radius: .8rem; background: var(--surface-soft); color: var(--cyan-700); font-weight: 800; }
.curriculum-list small { color: var(--ink-500); }
.module-item__content { min-inline-size: 0; }
.module-item__content > .progress-bar { margin-block: .75rem; }
.module-lessons { display: grid; gap: .4rem; margin: .9rem 0 0; padding: 0; list-style: none; }
.module-lessons li { border-radius: .75rem; background: var(--surface-soft); }
.module-lessons a { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: .75rem; color: var(--ink-800); padding: .65rem .75rem; text-decoration: none; }
.module-lessons a:hover { background: var(--cyan-50); color: var(--cyan-700); }
.module-lessons strong, .module-lessons small { display: block; }
.quiz-form { margin-block-start: 1rem; }
.quiz-form fieldset { min-inline-size: 0; }
.quiz-form legend { max-inline-size: 100%; padding-inline: .25rem; }
.quiz-choices { display: grid; gap: .35rem; margin-block-start: .75rem; }

.checkout-steps { display: flex; align-items: center; gap: .5rem; margin-block: 1rem 2rem; padding: 0; list-style: none; }
.checkout-steps li { display: flex; align-items: center; gap: .5rem; color: var(--ink-500); font-size: .82rem; }
.checkout-steps li:not(:last-child)::after { content: ""; inline-size: clamp(1rem, 5vw, 4rem); block-size: 1px; background: var(--line-strong); }
.checkout-steps li[aria-current="step"] { color: var(--cyan-700); font-weight: 800; }
.order-summary dl { margin: 0; }
.order-summary dl > div { display: flex; justify-content: space-between; gap: 1rem; padding-block: .6rem; border-block-end: 1px solid var(--line); }
.order-summary dt { color: var(--ink-600); }
.order-summary dd { margin: 0; color: var(--ink-900); font-weight: 700; text-align: end; }
.order-summary__total { margin-block-start: 1rem; padding-block-start: 1rem; border-block-start: 2px solid var(--ink-900); }
.order-summary__total strong { font-size: 1.35rem; }
.payment-state { max-inline-size: 46rem; margin: 4rem auto; text-align: center; }
.payment-state__icon { display: grid; place-items: center; inline-size: 5rem; block-size: 5rem; margin: 0 auto 1.5rem; border-radius: 50%; background: var(--success-soft); color: var(--success); font-size: 2rem; font-weight: 900; }
.payment-state--pending .payment-state__icon { background: var(--warning-soft); color: var(--warning); }
.payment-state--error .payment-state__icon { background: var(--danger-soft); color: var(--danger); }
.payment-reference { display: inline-flex; align-items: center; gap: .5rem; border-radius: .7rem; background: var(--surface-soft); padding: .45rem .75rem; color: var(--ink-700); font-size: .8rem; }

.lesson-layout { display: grid; grid-template-columns: minmax(0, 1fr) 19rem; align-items: start; gap: 1.5rem; }
.video-frame { position: relative; display: grid; place-items: center; aspect-ratio: 16 / 9; overflow: hidden; border-radius: var(--radius-lg); background: radial-gradient(circle at 70% 30%, #1f5570, transparent 30%), #10182f; color: #fff; box-shadow: var(--shadow-md); }
.video-frame video { inline-size: 100%; block-size: 100%; }
.video-placeholder { text-align: center; }
.play-button { display: grid; place-items: center; inline-size: 4.2rem; block-size: 4.2rem; margin: 0 auto 1rem; border: 1px solid rgba(255,255,255,.5); border-radius: 50%; background: rgba(255,255,255,.12); color: #fff; font-size: 1.4rem; }
.lesson-sidebar { position: sticky; inset-block-start: calc(var(--header-height) + 1rem); }
.lesson-nav { margin: 0; padding: 0; list-style: none; }
.lesson-nav li { border-block-end: 1px solid var(--line); }
.lesson-nav a { display: grid; grid-template-columns: auto 1fr; gap: .65rem; color: var(--ink-700); padding-block: .7rem; text-decoration: none; font-size: .82rem; }
.lesson-nav a[aria-current="page"] { color: var(--cyan-700); font-weight: 800; }
.lesson-index { display: grid; place-items: center; inline-size: 1.7rem; block-size: 1.7rem; border-radius: .45rem; background: var(--surface-soft); }
.transcript { border-inline-start: 3px solid var(--cyan-500); padding-inline-start: 1rem; }
.transcript p { color: var(--ink-700); }
.transcript time { color: var(--cyan-700); font-size: .8rem; font-weight: 700; }

.problem-toolbar { display: grid; grid-template-columns: minmax(14rem, 1fr) repeat(2, minmax(10rem, auto)); gap: .75rem; margin-block-end: 1rem; }
.problem-list { display: grid; gap: .75rem; }
.problem-card { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 1rem; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); padding: 1rem; }
.problem-card__meta { display: flex; flex-wrap: wrap; gap: .4rem .9rem; color: var(--ink-500); font-size: .76rem; }
.problem-card h3 { margin-block-end: .45rem; font-size: 1rem; }
.status-select { min-block-size: 2.5rem; border: 1px solid var(--line-strong); border-radius: .7rem; background: #fff; padding-inline: .65rem; color: var(--ink-800); }
.problem-detail-meta { display: grid; grid-template-columns: repeat(3, 1fr); gap: .75rem; }
.problem-detail-meta div { border-radius: .75rem; background: var(--surface-soft); padding: .8rem; }
.problem-detail-meta dt { color: var(--ink-500); font-size: .74rem; }
.problem-detail-meta dd { margin: .15rem 0 0; font-weight: 700; }

.ticket-card { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 1rem; border-block-end: 1px solid var(--line); padding-block: 1rem; }
.ticket-card:last-child { border: 0; }
.ticket-card h3 { margin-block-end: .25rem; font-size: 1rem; }
.ticket-card p { margin: 0; color: var(--ink-500); font-size: .8rem; }
.ticket-thread { display: grid; gap: 1rem; }
.message-bubble { max-inline-size: 82%; border: 1px solid var(--line); border-radius: 1rem 1rem .3rem 1rem; background: var(--surface); padding: 1rem; }
.message-bubble--staff { margin-inline-start: auto; border-radius: 1rem 1rem 1rem .3rem; background: var(--cyan-50); }
.message-bubble__meta { display: flex; justify-content: space-between; gap: 1rem; margin-block-end: .5rem; color: var(--ink-500); font-size: .74rem; }

.empty-state { max-inline-size: 38rem; margin: 3rem auto; text-align: center; }
.empty-state__motif { position: relative; display: block; inline-size: 5rem; block-size: 5rem; margin: 0 auto 1rem; border: 1px dashed var(--line-strong); border-radius: 50%; }
.empty-state__motif::before, .empty-state__motif::after { content: ""; position: absolute; inset-block-start: 50%; inline-size: 1rem; block-size: 1rem; border-radius: .3rem; background: var(--cyan-500); transform: translateY(-50%); }
.empty-state__motif::before { inset-inline-start: .7rem; }
.empty-state__motif::after { inset-inline-end: .7rem; background: var(--gold-500); }
.empty-state p { color: var(--ink-600); }

.profile-grid { display: grid; grid-template-columns: 16rem minmax(0, 1fr); align-items: start; gap: 1.5rem; }
.profile-nav { position: sticky; inset-block-start: calc(var(--header-height) + 1rem); display: grid; gap: .3rem; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); padding: .75rem; }
.profile-nav a { border-radius: .65rem; color: var(--ink-700); padding: .55rem .7rem; text-decoration: none; font-size: .85rem; }
.profile-nav a[aria-current="page"], .profile-nav a:hover { background: var(--cyan-50); color: var(--cyan-700); }
.settings-section + .settings-section { margin-block-start: 1rem; }
.settings-row { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; padding-block: .8rem; border-block-end: 1px solid var(--line); }
.settings-row:last-child { border: 0; }
.settings-row p { margin: 0; }
.settings-row small { display: block; color: var(--ink-500); }

.timeline { position: relative; display: grid; gap: 1rem; margin: 0; padding: 0; list-style: none; }
.timeline::before { content: ""; position: absolute; inset-block: 1.3rem; inset-inline-start: 1.2rem; inline-size: 2px; background: var(--line-strong); }
.timeline li { position: relative; display: grid; grid-template-columns: 2.5rem 1fr; gap: 1rem; }
.timeline__marker { z-index: 1; display: grid; place-items: center; inline-size: 2.5rem; block-size: 2.5rem; border: 2px solid var(--surface); border-radius: .8rem; background: var(--cyan-600); color: #fff; box-shadow: 0 0 0 2px var(--cyan-100); font-weight: 800; }
.timeline__content { border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--surface); padding: 1rem; }
.timeline__content p:last-child { margin-block-end: 0; }

.compare-table th:first-child { min-inline-size: 12rem; }
.compare-table td { min-inline-size: 12rem; }
.compare-highlight { background: var(--cyan-50); }
.receipt { max-inline-size: 48rem; margin: 2rem auto; }
.receipt__header { display: flex; align-items: flex-start; justify-content: space-between; gap: 2rem; padding-block-end: 1.5rem; border-block-end: 2px solid var(--ink-900); }
.receipt__meta { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; margin-block: 1.5rem; }
.receipt__meta div { border-radius: .7rem; background: var(--surface-soft); padding: .8rem; }
.receipt__meta dt { color: var(--ink-500); font-size: .74rem; }
.receipt__meta dd { margin: .2rem 0 0; font-weight: 700; }
.print-only { display: none; }

@media (max-width: 68rem) {
    .site-header__inner { grid-template-columns: auto auto 1fr; }
    .nav-toggle { display: block; }
    .primary-nav { position: absolute; inset-block-start: calc(100% + .35rem); inset-inline: 1rem; display: none; max-block-size: calc(100vh - 7rem); overflow: auto; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--surface); box-shadow: var(--shadow-md); padding: .75rem; }
    .primary-nav[data-open="true"] { display: grid; }
    .primary-nav a { padding: .7rem .8rem; }
    .primary-nav .nav-mobile-action { display: block; }
    .site-actions { justify-self: end; }
    .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .site-footer__grid { grid-template-columns: repeat(2, 1fr); }
    .dashboard-layout { grid-template-columns: 1fr; }
    .dashboard-sidebar { border-inline-end: 0; border-block-end: 1px solid var(--line); padding: .65rem 1rem; overflow-x: auto; }
    .dashboard-sidebar nav { position: static; display: flex; min-inline-size: max-content; }
    .dashboard-sidebar a { white-space: nowrap; }
    .span-8, .span-7 { grid-column: span 12; }
    .span-6, .span-5, .span-4 { grid-column: span 6; }
}

@media (max-width: 52rem) {
    :root { --header-height: 4.25rem; }
    body { font-size: .96rem; }
    .container { inline-size: min(100% - 1.25rem, var(--container)); }
    .brand__copy small { display: none; }
    .site-actions .button--quiet, .user-chip > span:last-child { display: none; }
    .site-header__inner { gap: .45rem; }
    .page-hero__grid, .detail-hero__grid, .form-shell, .lesson-layout, .profile-grid { grid-template-columns: 1fr; }
    .page-hero { padding-block-start: 3rem; }
    .algorithm-visual { min-block-size: auto; }
    .section-heading, .subpage-header__inner, .dashboard-header { align-items: flex-start; flex-direction: column; }
    .cards { grid-template-columns: 1fr; }
    .metric-grid, .fact-strip { grid-template-columns: repeat(2, 1fr); }
    .filter-shell, .detail-layout { grid-template-columns: 1fr; }
    .filter-panel, .sticky-summary, .lesson-sidebar, .profile-nav { position: static; }
    .filter-panel { display: none; }
    .filter-panel[data-open="true"] { display: block; }
    .filter-toggle { display: inline-flex !important; }
    .form-shell { margin-block: 1rem; }
    .form-shell__aside { order: -1; }
    .dashboard-main { padding-inline: .75rem; }
    .span-6, .span-5, .span-4 { grid-column: span 12; }
    .problem-toolbar { grid-template-columns: 1fr; }
    .problem-card { grid-template-columns: 1fr; }
    .problem-detail-meta { grid-template-columns: 1fr; }
    .site-footer__grid { grid-template-columns: 1fr; gap: 2rem; }
    .site-footer__bottom { flex-direction: column; }
    .receipt__meta { grid-template-columns: 1fr; }
    .receipt__header { flex-direction: column; }
    .data-table--responsive { display: block; }
    .data-table--responsive thead { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
    .data-table--responsive tbody, .data-table--responsive tr, .data-table--responsive td { display: block; inline-size: 100%; }
    .data-table--responsive tr { padding: .65rem .8rem; border-block-end: 1px solid var(--line); }
    .data-table--responsive tr:last-child { border-block-end: 0; }
    .data-table--responsive td { display: grid; grid-template-columns: minmax(6rem, .45fr) minmax(0, 1fr); gap: .75rem; padding: .6rem .15rem; border: 0; }
    .data-table--responsive td::before { content: attr(data-label); color: var(--ink-500); font-size: .78rem; font-weight: 700; }
}

@media (max-width: 34rem) {
    .brand__copy { display: none; }
    .split { align-items: flex-start; flex-direction: column; }
    .site-actions .button--primary { padding-inline: .7rem; }
    .page-hero__actions .button, .form-actions .button { inline-size: 100%; }
    .metric-grid, .fact-strip { grid-template-columns: 1fr; }
    .path-node { grid-template-columns: 2.4rem 1fr; }
    .path-node > span:last-child { grid-column: 2; }
    .checkout-steps { justify-content: space-between; }
    .checkout-steps li span { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip: rect(0,0,0,0); }
    .message-bubble { max-inline-size: 95%; }
    .module-lessons a { grid-template-columns: auto minmax(0, 1fr); }
    .module-lessons .status { grid-column: 2; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

@media print {
    .site-header, .announcement-bar, .site-footer, .page-grid, .no-print, .button { display: none !important; }
    body { background: #fff; color: #000; }
    .container { inline-size: 100%; }
    .card, .receipt { border-color: #bbb; box-shadow: none; }
    .print-only { display: block; }
}