/*
 * Mendeleev, direction «Лаборатория» (DESIGN.md): a cell of the periodic table, the 80 px grid, monospaced labels.
 * Everything comes from this site (FR-WEB-10). Fonts: Fontsource 5.3.0 subsets of Geologica and IBM Plex Mono,
 * SIL OFL 1.1 (fonts/OFL-*.txt); a page downloads only the subsets its characters need.
 */

@font-face {
    font-family: "Geologica";
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
    src: url("/fonts/geologica-cyrillic-wght-normal.woff2") format("woff2");
    unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}

@font-face {
    font-family: "Geologica";
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
    src: url("/fonts/geologica-latin-wght-normal.woff2") format("woff2");
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
        U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* The rouble sign lives here. */
@font-face {
    font-family: "Geologica";
    font-style: normal;
    font-weight: 100 900;
    font-display: swap;
    src: url("/fonts/geologica-latin-ext-wght-normal.woff2") format("woff2");
    unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
        U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
    font-family: "IBM Plex Mono";
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url("/fonts/ibm-plex-mono-cyrillic-500-normal.woff2") format("woff2");
    unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116;
}

@font-face {
    font-family: "IBM Plex Mono";
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url("/fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2");
    unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329,
        U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
    font-family: "IBM Plex Mono";
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url("/fonts/ibm-plex-mono-latin-ext-500-normal.woff2") format("woff2");
    unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329,
        U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

/* ---------- Tokens ---------- */

:root {
    color-scheme: light dark;

    /* Brand tokens, as in DESIGN.md («Цвет»). */
    --md-bg: #F4F3EE;
    --md-surface: #FFFFFF;
    --md-ink: #0E1116;
    --md-ink-muted: #5B6170;
    --md-line: #D9D8D2;
    --md-accent: #2F5BFF;
    --md-on-accent: #FFFFFF;
    --md-accent-soft: #E3E9FF;
    --md-inverse-bg: #0E1116;
    --md-inverse-ink: #F4F3EE;
    --md-decor: #C9D3FF;
    --md-success: #12A150;
    --md-warning: #E08A00;
    --md-danger: #E5484D;
    --md-radius-card: 4px;
    --md-radius-chip: 2px;

    /* Derived for the site. Contrast ratios are WCAG 2.1. */
    --md-link: var(--md-accent);       /* 4.7 on bg, 5.2 on surface */
    --md-accent-hover: #1F48E8;        /* white on it: 6.7 */
    --md-on-status: #0E1116;           /* text and icons on success / warning / danger in both themes: 5.6 / 7.0 / 4.8 */
    --md-field: var(--md-ink-muted);   /* borders of inputs: at least 3:1 against the surface */
    --md-grid-line: color-mix(in srgb, var(--md-decor) 50%, transparent); /* as on the cover in Figma */

    --md-font-sans: "Geologica", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    --md-font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Consolas, monospace;

    --md-grid: 80px;
    --md-gutter: 16px;
    --md-container: 1040px; /* 13 cells of the grid */

    /* Glyphs for masks: the colour comes from the element. */
    --md-icon-check: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M2.5 8.5l3.5 3.5 7.5-8' fill='none' stroke='%23000' stroke-width='2.4'/%3E%3C/svg%3E");
    --md-icon-alert: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M6.8 2h2.4v7.5H6.8zm0 9.5h2.4V14H6.8z'/%3E%3C/svg%3E");
    --md-icon-info: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M6.8 2h2.4v2.5H6.8zm0 4.5h2.4V14H6.8z'/%3E%3C/svg%3E");
    --md-icon-cross: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 3l10 10M13 3L3 13' fill='none' stroke='%23000' stroke-width='2.4'/%3E%3C/svg%3E");
}

/* Dark: the inverse tokens become the page. The accent stays for fills (white on it: 5.2); links get a lighter
   cobalt, since #2F5BFF on #0E1116 is only 3.6. */
@media (prefers-color-scheme: dark) {
    :root {
        --md-bg: #0E1116;
        --md-surface: #161A21;
        --md-ink: #F4F3EE;
        --md-ink-muted: #9AA0AD;   /* 6.7 on surface */
        --md-line: #2A2F39;
        --md-accent-soft: #19264D;
        --md-decor: #1C2339;
        --md-link: #7F9BFF;        /* 6.7 on surface, 7.2 on bg */
        --md-field: #6B7282;       /* 3.6 on surface */
        --md-grid-line: var(--md-decor);
    }
}

/* ---------- Base ---------- */

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

html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

/* cabinet.js toggles blocks by this attribute; a component's own display must not win over it. */
[hidden] {
    display: none !important;
}

body {
    margin: 0;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    font: 400 16px/1.55 var(--md-font-sans);
    color: var(--md-ink);
    background: var(--md-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3 {
    font-weight: 600;
    letter-spacing: -0.01em;
    text-wrap: balance;
}

h1 {
    margin: 0 0 20px;
    font-size: clamp(1.875rem, 1.35rem + 2.2vw, 2.5rem);
    line-height: 1.1;
}

h2 {
    margin: 40px 0 12px;
    font-size: 1.375rem;
    line-height: 1.25;
}

h3 {
    margin: 24px 0 8px;
    font-size: 1.125rem;
    line-height: 1.3;
}

p,
ul,
ol,
dl {
    margin: 0 0 16px;
}

a {
    color: var(--md-link);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

a:hover {
    text-decoration-thickness: 2px;
}

b,
strong {
    font-weight: 600;
}

code {
    padding: 0.1em 0.35em;
    font: 500 0.875em/1.4 var(--md-font-mono);
    background: var(--md-accent-soft);
    border-radius: var(--md-radius-chip);
}

:focus-visible {
    outline: 2px solid var(--md-accent);
    outline-offset: 2px;
}

::selection {
    color: var(--md-on-accent);
    background: var(--md-accent);
}

.muted {
    color: var(--md-ink-muted);
}

/* Labels and codes: IBM Plex Mono Medium in capitals (DESIGN.md, «Метки и коды»). */
.label,
label[for],
th,
dt,
.site-nav,
.site-footer,
.subnav,
.chip,
.tariff-period {
    font-family: var(--md-font-mono);
    font-weight: 500;
    font-size: 0.75rem;
    line-height: 1.2;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.label,
dt {
    display: block;
    color: var(--md-ink-muted);
}

/* ---------- Page ---------- */

.container {
    width: 100%;
    max-width: calc(var(--md-container) + 2 * var(--md-gutter));
    margin: 0 auto;
    padding: 0 var(--md-gutter);
}

.site-header {
    background: var(--md-bg);
    border-bottom: 1px solid var(--md-line);
}

.site-header .container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 28px;
    min-height: 64px;
    padding-top: 12px;
    padding-bottom: 12px;
}

/* Lockup: below 64 px the mark goes without «101» (DESIGN.md, «Знак и логотип»). */
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-right: auto;
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--md-ink);
    text-decoration: none;
}

.brand img {
    display: block;
    width: 32px;
    height: 32px;
}

.site-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 4px 24px;
}

.site-nav form {
    display: inline;
    margin: 0;
}

.site-nav a,
.site-nav .link-button {
    padding: 6px 0 4px;
    color: var(--md-ink);
    text-decoration: none;
    border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav .link-button:hover {
    color: var(--md-link);
}

.site-nav a[aria-current="page"] {
    border-bottom-color: var(--md-accent);
}

.link-button {
    padding: 0;
    font: inherit;
    letter-spacing: inherit;
    text-transform: inherit;
    color: inherit;
    background: none;
    border: 0;
    cursor: pointer;
}

.site-main {
    flex: 1 0 auto;
    padding: 40px 0 64px;
}

/* The grid of the brand (DESIGN.md, «Декор»): lines every 80 px from the left edge of the content, so a cell
   of three by three is exactly the mark on the home page. */
.grid-band {
    padding-top: var(--md-grid);
    background-image:
        linear-gradient(to right, var(--md-grid-line) 1px, transparent 1px),
        linear-gradient(to bottom, var(--md-grid-line) 1px, transparent 1px);
    background-size: var(--md-grid) var(--md-grid);
    background-position: calc(50% - var(--md-container) / 2 + var(--md-grid) / 2) 0;
}

.site-footer {
    color: var(--md-ink-muted);
    background: var(--md-bg);
    border-top: 1px solid var(--md-line);
}

.site-footer .container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px 24px;
    padding-top: 20px;
    padding-bottom: 24px;
}

.site-footer nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 24px;
}

.site-footer a {
    color: inherit;
    text-decoration: none;
}

.site-footer a:hover {
    color: var(--md-ink);
    text-decoration: underline;
}

.prose {
    max-width: 720px;
}

.prose h2 {
    margin-top: 32px;
}

.prose li + li {
    margin-top: 6px;
}

/* Support contacts (contacts page, offer, policy): a label over each value. */
.contact-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
    gap: 20px 32px;
}

.contact-list dd {
    margin: 6px 0 0;
    overflow-wrap: anywhere;
}

/* ---------- Components ---------- */

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 10px 20px;
    font: 600 0.9375rem/1.2 var(--md-font-sans);
    letter-spacing: 0;
    text-align: center;
    text-decoration: none;
    text-transform: none;
    color: var(--md-on-accent);
    background: var(--md-accent);
    border: 1px solid var(--md-accent);
    border-radius: var(--md-radius-chip);
    cursor: pointer;
    transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.button:hover {
    background: var(--md-accent-hover);
    border-color: var(--md-accent-hover);
}

.button.secondary {
    color: var(--md-ink);
    background: transparent;
    border-color: var(--md-ink);
}

.button.secondary:hover {
    background: var(--md-accent-soft);
    border-color: var(--md-accent);
}

/* Text on a status colour is always ink (DESIGN.md, «Контраст»). */
.button.danger {
    color: var(--md-on-status);
    background: var(--md-danger);
    border-color: var(--md-danger);
}

.button.danger:hover {
    background: color-mix(in srgb, var(--md-danger) 85%, #FFFFFF);
    border-color: color-mix(in srgb, var(--md-danger) 85%, #FFFFFF);
}

.actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px 20px;
    margin: 24px 0;
}

.panel {
    margin: 24px 0;
    padding: 24px;
    background: var(--md-surface);
    border: 1px solid var(--md-line);
    border-radius: var(--md-radius-card);
}

.panel > :first-child {
    margin-top: 0;
}

.panel > :last-child {
    margin-bottom: 0;
}

/* Notices: a status cell with a glyph next to the text, so the meaning never rests on colour alone. */
.notice {
    --notice: var(--md-accent);
    --notice-ink: var(--md-on-accent);
    --notice-icon: var(--md-icon-info);
    position: relative;
    margin: 20px 0;
    padding: 14px 16px 14px 52px;
    background: var(--md-surface);
    border: 1px solid var(--md-line);
    border-left: 3px solid var(--notice);
    border-radius: var(--md-radius-card);
}

.notice::before,
.notice::after {
    content: "";
    position: absolute;
    top: 15px;
    left: 16px;
    width: 22px;
    height: 22px;
    border-radius: var(--md-radius-chip);
}

.notice::before {
    background: var(--notice);
}

.notice::after {
    background: var(--notice-ink);
    -webkit-mask: var(--notice-icon) center / 14px no-repeat;
    mask: var(--notice-icon) center / 14px no-repeat;
}

.notice.ok {
    --notice: var(--md-success);
    --notice-ink: var(--md-on-status);
    --notice-icon: var(--md-icon-check);
}

.notice.warn {
    --notice: var(--md-warning);
    --notice-ink: var(--md-on-status);
    --notice-icon: var(--md-icon-alert);
}

.notice.error {
    --notice: var(--md-danger);
    --notice-ink: var(--md-on-status);
    --notice-icon: var(--md-icon-alert);
}

.notice > p {
    margin: 0 0 8px;
}

.notice > :last-child {
    margin-bottom: 0;
}

.chip {
    --chip-icon: var(--md-icon-info);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 8px;
    white-space: nowrap;
    color: var(--md-ink);
    background: var(--md-accent-soft);
    border-radius: var(--md-radius-chip);
}

.chip::before {
    content: "";
    flex: none;
    width: 12px;
    height: 12px;
    background: currentColor;
    -webkit-mask: var(--chip-icon) center / contain no-repeat;
    mask: var(--chip-icon) center / contain no-repeat;
}

.chip.success {
    --chip-icon: var(--md-icon-check);
    color: var(--md-on-status);
    background: var(--md-success);
}

.chip.warning {
    --chip-icon: var(--md-icon-alert);
    color: var(--md-on-status);
    background: var(--md-warning);
}

.chip.danger {
    --chip-icon: var(--md-icon-cross);
    color: var(--md-on-status);
    background: var(--md-danger);
}

.table-wrap {
    overflow-x: auto;
    margin: 20px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-variant-numeric: tabular-nums;
}

th,
td {
    padding: 12px;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--md-line);
}

th {
    padding-top: 8px;
    padding-bottom: 8px;
    color: var(--md-ink-muted);
    border-bottom-color: var(--md-ink);
}

tbody tr:last-child td {
    border-bottom: 0;
}

label[for] {
    display: block;
    margin: 20px 0 8px;
    color: var(--md-ink-muted);
}

input[type="text"],
input[type="password"] {
    display: block;
    width: 100%;
    max-width: 420px;
    min-height: 48px;
    padding: 10px 14px;
    font: 400 1rem/1.4 var(--md-font-sans);
    color: var(--md-ink);
    background: var(--md-surface);
    border: 1px solid var(--md-field);
    border-radius: var(--md-radius-chip);
}

input[type="text"]:focus-visible,
input[type="password"]:focus-visible {
    border-color: var(--md-accent);
    outline-offset: 0;
}

/* An example of the format, lighter than a typed value. */
input::placeholder {
    color: var(--md-ink-muted);
    opacity: 0.6;
}

input.code {
    font-family: var(--md-font-mono);
    font-weight: 500;
    font-size: 1.125rem;
    letter-spacing: 0.08em;
}

.check {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin: 20px 0 8px;
    cursor: pointer;
}

.check input {
    flex: none;
    width: 18px;
    height: 18px;
    margin: 3px 0 0;
    accent-color: var(--md-accent);
}

/* The account key: shown once, like a coupon with a code (DESIGN.md, «Промокод»). */
.coupon {
    margin: 24px 0;
    padding: 20px;
    background: var(--md-surface);
    border: 1px dashed var(--md-ink-muted);
    border-radius: var(--md-radius-card);
}

.secret {
    margin: 0 0 16px;
    font: 500 clamp(1.375rem, 1rem + 1.6vw, 1.75rem)/1.3 var(--md-font-mono);
    letter-spacing: 0.06em;
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
}

/* The subscription link: one click selects all of it. */
.link {
    padding: 12px 14px;
    font: 500 0.8125rem/1.5 var(--md-font-mono);
    word-break: break-all;
    background: var(--md-bg);
    border: 1px solid var(--md-line);
    border-radius: var(--md-radius-chip);
    user-select: all;
}

/* A QR code is scanned off a white background in both themes. */
.qr {
    display: block;
    max-width: 100%;
    height: auto;
    padding: 8px;
    background: #FFFFFF;
    border: 1px solid var(--md-line);
    border-radius: var(--md-radius-chip);
    image-rendering: pixelated;
}

.content {
    white-space: pre-line;
}

/* Instructions and the FAQ: joined cells that open one by one. */
.accordion {
    margin: 24px 0;
}

.accordion > details {
    margin: 0;
    padding: 0;
    border-radius: 0;
}

.accordion > details + details {
    border-top: 0;
}

.accordion > details:first-child {
    border-radius: var(--md-radius-card) var(--md-radius-card) 0 0;
}

.accordion > details:last-child {
    border-radius: 0 0 var(--md-radius-card) var(--md-radius-card);
}

.accordion > details:only-child {
    border-radius: var(--md-radius-card);
}

.accordion summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px;
    font-weight: 600;
    list-style: none;
    cursor: pointer;
}

.accordion summary::-webkit-details-marker {
    display: none;
}

.accordion summary::after {
    content: "+";
    flex: none;
    font: 500 1.25rem/1 var(--md-font-mono);
    color: var(--md-ink-muted);
}

.accordion details[open] > summary::after {
    content: "\2212";
}

.accordion summary:hover {
    color: var(--md-link);
}

.accordion .content {
    padding: 0 20px 20px;
}

/* ---------- Cabinet ---------- */

/* The cabinet's sections are cells of a table, numbered like elements. */
.subnav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    margin: 0 0 32px;
    counter-reset: subnav;
    border-top: 1px solid var(--md-line);
    border-left: 1px solid var(--md-line);
}

.subnav a {
    counter-increment: subnav;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 12px;
    min-height: 64px;
    padding: 8px 12px 10px;
    color: var(--md-ink);
    text-decoration: none;
    background: var(--md-surface);
    border-right: 1px solid var(--md-line);
    border-bottom: 1px solid var(--md-line);
}

.subnav a::before {
    content: counter(subnav, decimal-leading-zero);
    content: counter(subnav, decimal-leading-zero) / "";
    font-size: 0.625rem;
    color: var(--md-ink-muted);
}

.subnav a:hover {
    background: var(--md-accent-soft);
}

.subnav a[aria-current="page"] {
    color: var(--md-on-accent);
    background: var(--md-accent);
}

.subnav a[aria-current="page"]::before {
    color: inherit;
}

.sub-card {
    padding: 0;
    overflow: hidden;
}

.sub-head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px 32px;
    padding: 24px;
}

.sub-tariff {
    margin: 8px 0 0;
    font-size: 1.75rem;
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: -0.01em;
}

.sub-status .chip {
    margin-top: 8px;
}

/* Facts of the subscription: cells divided by hairlines. */
.stats {
    display: flex;
    flex-wrap: wrap;
    gap: 1px;
    margin: 0;
    background: var(--md-line);
    border-top: 1px solid var(--md-line);
    border-bottom: 1px solid var(--md-line);
}

.stat {
    flex: 1 1 200px;
    padding: 18px 24px 20px;
    background: var(--md-surface);
}

.stat dd {
    margin: 10px 0 0;
    font-size: 1.125rem;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.stat-big dd {
    font-size: 3rem;
    line-height: 1;
    letter-spacing: -0.02em;
}

.sub-section {
    padding: 24px;
}

.sub-section + .sub-section {
    border-top: 1px solid var(--md-line);
}

.sub-section > :first-child {
    margin-top: 0;
}

.sub-section > :last-child {
    margin-bottom: 0;
}

.sub-section > .notice:first-child {
    margin-top: 0;
}

.sub-link {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 24px 40px;
    align-items: start;
}

.sub-link h2 {
    margin: 0 0 12px;
    font-size: 1.125rem;
}

.sub-link .actions {
    margin: 16px 0;
}

.stat dd .muted {
    font-weight: 400;
}

.devices-count {
    font-size: 1.125rem;
}

.pay-summary {
    font-size: 1.375rem;
    line-height: 1.3;
}

/* One square per device of the limit, the used ones filled (the sentence above says the same in words). */
.meter {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 0 0 20px;
}

.meter span {
    width: 24px;
    height: 24px;
    border: 1px solid var(--md-field);
    border-radius: var(--md-radius-chip);
}

.meter span.on {
    background: var(--md-accent);
    border-color: var(--md-accent);
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
    gap: 16px;
    margin: 24px 0;
}

.settings-grid .panel {
    display: flex;
    flex-direction: column;
    margin: 0;
}

.settings-grid h2 {
    font-size: 1.125rem;
}

.settings-grid form {
    margin-top: auto;
    padding-top: 8px;
}

/* Numbered steps: 01, 02, 03 — the monospaced numbers of the brand. */
.steps {
    margin: 24px 0;
    padding: 0;
    list-style: none;
    counter-reset: step;
    background: var(--md-surface);
    border: 1px solid var(--md-line);
    border-radius: var(--md-radius-card);
}

.steps > li {
    counter-increment: step;
    position: relative;
    padding: 16px 20px 16px 68px;
    overflow-wrap: anywhere;
}

.steps > li + li {
    border-top: 1px solid var(--md-line);
}

.steps > li::before {
    content: counter(step, decimal-leading-zero);
    position: absolute;
    top: 16px;
    left: 20px;
    font: 500 0.875rem/1.55 var(--md-font-mono);
    color: var(--md-link);
}

.support {
    margin-top: 40px;
    padding-top: 16px;
    border-top: 1px solid var(--md-line);
}

/* ---------- Tariffs ---------- */

/* A tariff is an element cell: period in the corner like the atomic number, the name like the symbol. */
.tariffs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
    gap: 16px;
    margin: 24px 0;
    padding: 0;
    list-style: none;
}

.tariff {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-height: 260px;
    padding: 20px;
    background: var(--md-surface);
    border: 1px solid var(--md-line);
    border-radius: var(--md-radius-card);
}

.tariff-period {
    color: var(--md-link);
}

.tariff-name {
    margin: 0;
    font-size: 1.75rem;
    line-height: 1.1;
}

/* Label on the left, value on the right, a row per fact. */
.tariff-facts {
    display: grid;
    grid-template-columns: auto auto;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px 12px;
    margin: 0;
    padding: 10px 0;
    border-top: 1px solid var(--md-line);
    border-bottom: 1px solid var(--md-line);
}

.tariff-facts dd {
    margin: 0;
    text-align: right;
}

/* The monthly equivalent is shown above the price, so the prices of all cards stand on one line. */
.tariff-price {
    display: flex;
    flex-direction: column-reverse;
    margin: auto 0 0;
    font-size: 2rem;
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.01em;
    font-variant-numeric: tabular-nums;
}

.tariff-price .muted {
    margin-bottom: 6px;
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0;
}

.tariff form {
    margin: 0;
}

.tariff .button {
    width: 100%;
}

/* ---------- Home and sign-in ---------- */

.hero {
    display: grid;
    grid-template-columns: calc(3 * var(--md-grid)) minmax(0, 1fr);
    gap: 32px var(--md-grid);
    align-items: start;
}

.hero-mark {
    display: block;
    width: calc(3 * var(--md-grid));
    height: calc(3 * var(--md-grid));
}

.hero h1 {
    margin: -6px 0 20px;
    font-size: clamp(2.5rem, 1.6rem + 3.6vw, 4rem);
    line-height: 1;
    letter-spacing: -0.02em;
}

.hero .lead {
    max-width: 34em;
    font-size: 1.1875rem;
}

/* Seven cells wide, three from the left edge: the card sits on the grid. */
.auth {
    max-width: calc(7 * var(--md-grid));
    margin: 0 auto;
}

.auth .panel {
    margin-top: 0;
    padding: 32px;
}

/* ---------- Narrow screens ---------- */

@media (max-width: 1071.98px) {
    .grid-band {
        background-position: var(--md-gutter) 0;
    }
}

@media (max-width: 719.98px) {
    .site-main {
        padding-top: 28px;
    }

    .grid-band {
        padding-top: calc(var(--md-grid) / 2);
        background-position: var(--md-gutter) calc(var(--md-grid) / 2);
    }

    .hero {
        grid-template-columns: minmax(0, 1fr);
    }

    .hero-mark {
        width: calc(2 * var(--md-grid));
        height: calc(2 * var(--md-grid));
    }

    .site-header .container,
    .site-nav {
        column-gap: 16px;
    }

    .panel,
    .auth .panel {
        padding: 20px 16px;
    }

    .panel.sub-card {
        padding: 0;
    }

    .sub-head,
    .sub-section {
        padding: 20px 16px;
    }

    .stat {
        padding: 16px;
    }

    .sub-link {
        grid-template-columns: minmax(0, 1fr);
    }

    .sub-link .qr {
        width: 220px;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
    }
}