:root {
    --primary: #245a70;
    --primary-dark: #173c4c;
    --accent: #2f7d72;
    --accent-dark: #225e56;
    --background: #f3f7f7;
    --surface: #ffffff;
    --surface-soft: #eaf2f2;
    --text: #17313d;
    --muted: #59707a;
    --border: #cad9dd;
    --danger: #a83232;
    --danger-soft: #fff0f0;
    --success: #226448;
    --success-soft: #eaf8f1;
    --info: #205b78;
    --info-soft: #eaf5fa;
    --shadow: 0 16px 38px rgba(23, 49, 61, 0.10);
    --radius: 18px;
    --radius-small: 10px;
    --content-width: 1120px;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    display: flex;
    flex-direction: column;
    color: var(--text);
    background:
        radial-gradient(circle at top left, #e0f0ee 0, transparent 34rem),
        var(--background);
    font-family:
        Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
        "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.6;
}

a {
    color: var(--primary);
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

a:hover {
    color: var(--primary-dark);
}

button,
input,
textarea,
select {
    font: inherit;
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 1000;
    padding: 10px 16px;
    color: #ffffff;
    background: var(--primary-dark);
    border-radius: 8px;
    transform: translateY(-150%);
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border);
}

.site-header__inner,
.page-shell,
.site-footer__inner {
    width: min(var(--content-width), calc(100% - 32px));
    margin-inline: auto;
}

.site-header__inner {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
    text-decoration: none;
}

.brand__mark {
    width: 46px;
    height: 46px;
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    color: #ffffff;
    background: var(--accent);
    border-radius: 50% 50% 44% 56%;
    font-size: 1.35rem;
    font-weight: 800;
}

.brand__name {
    display: block;
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.brand__tagline {
    display: block;
    color: var(--muted);
    font-size: 0.78rem;
    letter-spacing: 0;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 14px;
    color: var(--primary-dark);
    background: transparent;
    border: 0;
    border-radius: 9px;
    cursor: pointer;
    font-weight: 700;
    text-decoration: none;
}

.nav-link:hover {
    background: var(--surface-soft);
}

.button-reset {
    margin: 0;
}

.button {
    min-height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 20px;
    color: #ffffff;
    background: var(--primary);
    border: 2px solid var(--primary);
    border-radius: var(--radius-small);
    cursor: pointer;
    font-weight: 800;
    text-align: center;
    text-decoration: none;
}

.button:hover {
    color: #ffffff;
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

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

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

.button--outline {
    color: var(--primary);
    background: transparent;
}

.button--outline:hover {
    color: #ffffff;
}

.button--full {
    width: 100%;
}

.page-shell {
    flex: 1;
    padding-block: 38px 64px;
}

.alert {
    margin: 0 0 22px;
    padding: 14px 18px;
    border: 1px solid;
    border-radius: var(--radius-small);
}

.alert--success {
    color: var(--success);
    background: var(--success-soft);
    border-color: #99cfb3;
}

.alert--info {
    color: var(--info);
    background: var(--info-soft);
    border-color: #9bc7da;
}

.alert--danger {
    color: var(--danger);
    background: var(--danger-soft);
    border-color: #e0a4a4;
}

.alert ul {
    margin: 6px 0 0;
    padding-left: 22px;
}

.auth-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(340px, 470px);
    gap: clamp(28px, 6vw, 80px);
    align-items: center;
    min-height: 580px;
}

.auth-shell--register {
    align-items: start;
}

.auth-shell--register > .card {
    padding-top: 24px;
}

.auth-intro {
    max-width: 590px;
}

.eyebrow {
    margin: 0 0 10px;
    color: var(--accent-dark);
    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.auth-intro h1,
.card h1 {
    margin: 0;
    color: var(--primary-dark);
    font-size: clamp(2rem, 5vw, 3.6rem);
    line-height: 1.08;
}

.card h1 {
    font-size: clamp(1.65rem, 4vw, 2.25rem);
}

.lead {
    margin: 20px 0;
    color: var(--muted);
    font-size: 1.08rem;
}

.feature-list {
    margin: 26px 0 0;
    padding: 0;
    display: grid;
    gap: 14px;
    list-style: none;
}

.feature-list li {
    position: relative;
    padding-left: 34px;
}

.feature-list li::before {
    position: absolute;
    top: 1px;
    left: 0;
    width: 24px;
    height: 24px;
    display: grid;
    place-items: center;
    content: "✓";
    color: #ffffff;
    background: var(--accent);
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: 900;
}

.card {
    padding: clamp(24px, 5vw, 38px);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.card__header {
    margin-bottom: 26px;
}

.card__header p {
    margin: 10px 0 0;
    color: var(--muted);
}

.form-grid {
    display: grid;
    gap: 20px;
}

.form-group {
    display: grid;
    gap: 7px;
}

.form-label {
    font-weight: 800;
}

.form-hint {
    margin: 0;
    color: var(--muted);
    font-size: 0.88rem;
}

.form-control {
    width: 100%;
    min-height: 50px;
    padding: 11px 14px;
    color: var(--text);
    background: #ffffff;
    border: 2px solid var(--border);
    border-radius: var(--radius-small);
}

.form-control:focus {
    border-color: var(--primary);
    outline: 3px solid rgba(36, 90, 112, 0.18);
}

.form-control[aria-invalid="true"] {
    border-color: var(--danger);
}

.field-error {
    margin: 0;
    color: var(--danger);
    font-size: 0.9rem;
    font-weight: 700;
}

.checkbox-row {
    display: flex;
    align-items: flex-start;
    gap: 11px;
}

.checkbox-row input {
    width: 20px;
    height: 20px;
    margin-top: 3px;
    flex: 0 0 auto;
    accent-color: var(--primary);
}

.form-actions {
    display: grid;
    gap: 14px;
    margin-top: 4px;
}

.text-center {
    text-align: center;
}

.site-footer {
    color: var(--muted);
    background: #ffffff;
    border-top: 1px solid var(--border);
}

.site-footer__inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    font-size: 0.9rem;
}

.site-footer p {
    margin: 0;
}

:focus-visible {
    outline: 3px solid #e39824;
    outline-offset: 3px;
}

@media (max-width: 780px) {
    .site-header__inner {
        min-height: auto;
        padding-block: 14px;
        align-items: flex-start;
    }

    .brand__tagline {
        display: none;
    }

    .site-nav {
        flex-wrap: wrap;
        justify-content: flex-end;
    }

    .auth-shell {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .auth-intro {
        text-align: center;
        margin-inline: auto;
    }

    .feature-list {
        text-align: left;
    }

    .site-footer__inner {
        padding-block: 20px;
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 520px) {
    .site-header__inner {
        display: grid;
    }

    .site-nav {
        width: 100%;
        display: grid;
        grid-template-columns: 1fr 1fr;
    }

    .nav-link,
    .site-nav .button {
        width: 100%;
    }

    .page-shell {
        width: min(100% - 22px, var(--content-width));
        padding-top: 24px;
    }

    .card {
        padding: 23px 18px;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}