:root {
    color-scheme: light;

    --color-white: #ffffff;
    --color-background: #f8fafc;
    --color-surface: var(--color-white);
    --color-surface-secondary: #f1f5f9;
    --color-text: #18181b;
    --color-text-secondary: #71717a;
    --color-text-muted: #a1a1aa;
    --color-border: #e2e8f0;

    --color-primary: #4f46e5;
    --color-primary-hover: #4338ca;
    --color-primary-active: #3730a3;
    --color-primary-light: #eef2ff;
    --color-primary-light-secondary: #e0e7ff;
    --color-on-primary: var(--color-white);
    --color-on-primary-active: var(--color-white);
    --color-on-status: var(--color-white);

    --color-success: #16a34a;
    --color-success-background: #f0fdf4;
    --color-success-border: rgb(22 163 74 / 30%);
    --color-error: #dc2626;
    --color-error-background: #fef2f2;
    --color-error-border: rgb(220 38 38 / 30%);
    --color-warning: #d97706;
    --color-warning-background: #fffbeb;
    --color-warning-border: rgb(217 119 6 / 30%);
    --color-info: #2563eb;
    --color-info-background: #eff6ff;
    --color-info-border: rgb(37 99 235 / 30%);

    /*
     * Компоненты используют accent-токены, а не бренд напрямую.
     * В будущем их можно переопределить для темы или предмета.
     */
    --color-accent: var(--color-primary);
    --color-accent-hover: var(--color-primary-hover);
    --color-accent-active: var(--color-primary-active);
    --color-accent-light: var(--color-primary-light);
    --color-accent-light-secondary:
        var(--color-primary-light-secondary);
    --color-accent-border: var(--color-accent-light-secondary);
    --color-accent-glow: rgb(79 70 229 / 10%);
    --color-accent-shadow: rgb(79 70 229 / 16%);
    --color-focus-ring: rgb(79 70 229 / 20%);

    /* Совместимые имена для существующих компонентов. */
    --color-background-alt: var(--color-surface-secondary);
    --color-surface-light: var(--color-surface-secondary);
    --color-muted: var(--color-text-secondary);
    --color-disabled: var(--color-text-muted);

    --color-header-background: rgb(255 255 255 / 92%);
    --color-shadow: rgb(24 24 27 / 6%);
    --color-shadow-strong: rgb(24 24 27 / 10%);
}

body {
    min-height: 100vh;
    margin: 0;
    background-color: var(--color-background);
    color: var(--color-text);
    font-family: "Inter", Arial, sans-serif;
    font-size: 17px;
    line-height: 1.5;
}

header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-sizing: border-box;
    width: 100%;
    gap: 24px;
    padding: 14px 24px;
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-header-background);
    backdrop-filter: blur(14px);
}

header a {
    color: var(--color-text);
    text-decoration: none;
}

header > a {
    font-size: 20px;
    font-weight: bold;
}

nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

nav form {
    margin: 0;
}

.nav-notifications {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.nav-notifications__badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    min-width: 21px;
    height: 21px;
    padding: 0 6px;
    border-radius: 999px;
    background-color: var(--color-error);
    color: var(--color-on-status);
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
}

main {
    max-width: 960px;
    margin: 24px auto;
    padding: 24px;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 1px 3px var(--color-shadow);
}

main > h1 {
    margin-top: 0;
}

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

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

main form p {
    margin: 0 0 16px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: bold;
}

input,
select,
textarea {
    box-sizing: border-box;
    width: 100%;
    max-width: 480px;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: 7px;
    background-color: var(--color-surface);
    color: var(--color-text);
    font: inherit;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--color-accent);
    outline: 3px solid var(--color-focus-ring);
    outline-offset: 1px;
}

button {
    padding: 10px 16px;
    border: 1px solid transparent;
    border-radius: 7px;
    background-color: var(--color-accent);
    color: var(--color-on-primary);
    font: inherit;
    cursor: pointer;
    transition:
        background-color 0.2s ease,
        box-shadow 0.2s ease,
        transform 0.2s ease;
}

button:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-on-primary);
}

button:active {
    background-color: var(--color-accent-active);
    color: var(--color-on-primary);
    transform: translateY(1px);
}

button:disabled {
    background-color: var(--color-disabled);
    cursor: not-allowed;
}

.button--secondary {
    border-color: var(--color-border);
    background-color: var(--color-surface);
    color: var(--color-text);
    box-shadow: none;
}

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

.button--secondary:active {
    border-color: var(--color-accent-border);
    background-color: var(--color-accent-light);
    color: var(--color-text);
}

a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--color-focus-ring);
    outline-offset: 2px;
}

article {
    margin-bottom: 16px;
    padding: 18px;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    background-color: var(--color-surface);
}

article h2,
article h3 {
    margin-top: 0;
}

article p:last-child {
    margin-bottom: 0;
}

.brand,
.auth-brand {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    color: var(--color-text);
    text-decoration: none;
}

.brand__wordmark {
    color: var(--color-text);
    font-family: "Plus Jakarta Sans", "Inter", Arial, sans-serif;
    font-size: 23px;
    font-weight: 800;
    letter-spacing: -0.045em;
    line-height: 1;
    white-space: nowrap;
}

.brand__dot {
    color: var(--color-accent);
}

.brand__tagline {
    padding-left: 14px;
    border-left: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0;
    line-height: 1.35;
    white-space: nowrap;
}

h1,
h2,
h3 {
    font-family: "Plus Jakarta Sans", "Inter", Arial, sans-serif;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 34px;
    line-height: 1.2;
}

h2 {
    font-size: 26px;
    line-height: 1.25;
}

h3 {
    font-size: 20px;
    line-height: 1.3;
}

code,
pre,
kbd,
samp {
    font-family: "JetBrains Mono", monospace;
}
.messages {
    position: fixed;
    top: 76px;
    right: 24px;
    z-index: 1000;
    width: min(380px, calc(100% - 48px));
}

.message {
    padding: 14px 18px;
    border: 1px solid var(--color-border);
    border-radius: 10px;
    background-color: var(--color-surface);
    color: var(--color-text);
    box-shadow: 0 12px 32px var(--color-shadow-strong);
}

.message--success {
    border-color: var(--color-success-border);
    background-color: var(--color-success-background);
    color: var(--color-success);
}

.message--error {
    border-color: var(--color-error-border);
    background-color: var(--color-error-background);
    color: var(--color-error);
}

.message--warning {
    border-color: var(--color-warning-border);
    background-color: var(--color-warning-background);
    color: var(--color-warning);
}

.message--info {
    border-color: var(--color-info-border);
    background-color: var(--color-info-background);
    color: var(--color-info);
}

@media (max-width: 600px) {
    .messages {
        top: 16px;
        right: 16px;
        width: calc(100% - 32px);
    }
}
header nav > a {
    padding: 8px 10px;
    border-radius: 7px;
    transition:
        color 0.2s ease,
        background-color 0.2s ease;
}

header nav > a:hover {
    background-color: var(--color-accent-light);
    color: var(--color-accent-active);
}

header nav > span {
    color: var(--color-muted);
    font-size: 14px;
}

header nav button {
    padding: 8px 12px;
}

@media (max-width: 900px) {
    header {
        align-items: flex-start;
        flex-direction: column;
        gap: 14px;
    }

    header nav {
        width: 100%;
        gap: 8px;
    }
}

@media (max-width: 1300px) and (min-width: 901px) {
    .brand__tagline {
        display: none;
    }
}

@media (max-width: 600px) {
    .brand__tagline {
        display: none;
    }

    header nav {
        font-size: 14px;
    }
}
header nav > a.nav-link--active {
    background-color: var(--color-accent-light);
    color: var(--color-accent-active);
    box-shadow: inset 0 0 0 1px var(--color-accent-border);
}

header nav > a.nav-link--primary {
    border: 1px solid transparent;
    background-color: var(--color-accent);
    color: var(--color-on-primary);
    font-weight: 600;
}

header nav > a.nav-link--primary:hover {
    background-color: var(--color-accent-hover);
    color: var(--color-on-primary);
}

main:not(.auth-page) {
    box-sizing: border-box;
    width: calc(100% - 48px);
}

@media (max-width: 600px) {
    main:not(.auth-page) {
        width: calc(100% - 24px);
        margin: 12px auto;
        padding: 18px;
    }
}