/* Свой дизайн без UI-библиотек: цвета и отступы — в переменных */

:root {
    --color-ink: #14213d;
    --color-paper: #f6f7f4;
    --color-accent: #2f5fd0;
    --color-muted: #6a7280;
    --color-border: #dce1ea;
    --color-surface: #ffffff;
    --color-danger: #b42318;
    --radius: 12px;
    font-family: "IBM Plex Sans", "Segoe UI", Arial, sans-serif;
    font-size: 16px;
    color: var(--color-ink);
    background: var(--color-paper);
}

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

body {
    margin: 0;
}

h1 {
    margin: 0 0 24px;
    font-size: 32px;
    font-weight: 600;
}

h1:focus {
    outline: none;
}

h2 {
    margin: 0 0 12px;
    font-size: 20px;
    font-weight: 600;
}

a {
    color: var(--color-accent);
}

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

.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    background: #fdecea;
    color: var(--color-danger);
}

.card {
    padding: 20px 24px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
}

.stack {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.input,
.select {
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font: inherit;
    background: var(--color-surface);
}

.grow {
    flex: 1;
    min-width: 200px;
}

.button {
    padding: 10px 18px;
    border: none;
    border-radius: 8px;
    font: inherit;
    font-weight: 600;
    background: var(--color-accent);
    color: #ffffff;
    cursor: pointer;
}

.button:disabled {
    opacity: 0.5;
    cursor: default;
}

.button-secondary {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-ink);
}

.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 13px;
    background: #e3ecff;
    color: var(--color-ink);
}

.badge-off {
    background: #eceef2;
    color: var(--color-muted);
    text-decoration: line-through;
}

.badge-ok {
    background: #dcf3e3;
    color: #1d6b3a;
}

.badge-off-plain {
    background: #eceef2;
    color: var(--color-muted);
}

/* Главная страница */

.hero {
    padding: 16px 0 8px;
}

.lead {
    max-width: 720px;
    margin: 0 0 24px;
    font-size: 19px;
    line-height: 1.5;
}

.section {
    margin-top: 40px;
}

.section h2 {
    margin: 0;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: step;
}

.steps li {
    display: flex;
    flex-direction: column;
    gap: 6px;
    counter-increment: step;
}

.steps li strong::before {
    content: counter(step) ". ";
    color: var(--color-accent);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.stack-tight {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tech {
    font-size: 13px;
    color: var(--color-muted);
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border-radius: var(--radius);
    overflow: hidden;
}

.table th,
.table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
    vertical-align: top;
}

.table th {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-muted);
    text-transform: uppercase;
}

/* Веб-чат */

.chat {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 64px - 64px - 64px);
    min-height: 400px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 20px;
}

.chat-message {
    max-width: 70%;
    padding: 10px 14px;
    border-radius: var(--radius);
    background: #eef1f6;
}

.chat-author {
    font-weight: 600;
}

.chat-time {
    margin-left: 8px;
    font-size: 13px;
    color: var(--color-muted);
}

.chat-form {
    display: flex;
    gap: 8px;
    padding: 12px;
    border-top: 1px solid var(--color-border);
}