:root {
    --auth-primary: #3c8dbc;
    --auth-primary-dark: #2d6f96;
    --auth-bg: #eef3f8;
    --auth-surface: #ffffff;
    --auth-surface-soft: #f7fafc;
    --auth-text: #243447;
    --auth-text-soft: #708090;
    --auth-border: #d9e2ec;
    --auth-danger: #dc3545;
    --auth-success: #2f9e44;
    --auth-shadow: 0 22px 40px rgba(31, 53, 84, 0.12);
}

* {
    box-sizing: border-box;
}

html,
body,
form {
    margin: 0;
    min-height: 100%;
    font-family: "Segoe UI", Arial, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(60, 141, 188, 0.18), transparent 32%),
        linear-gradient(135deg, #eef3f8 0%, #f8fbfd 100%);
    color: var(--auth-text);
}

.auth-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px;
}

.auth-panel {
    width: min(980px, 100%);
    display: grid;
    grid-template-columns: 1fr 440px;
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 28px;
    box-shadow: var(--auth-shadow);
    overflow: hidden;
    backdrop-filter: blur(8px);
}

.register-panel {
    grid-template-columns: 0.9fr 1.35fr;
}

.auth-brand {
    padding: 52px 44px;
    background: linear-gradient(160deg, #1f4e79 0%, #3c8dbc 52%, #7ec8f2 100%);
    color: #ffffff;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.auth-kicker {
    font-size: 13px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    opacity: 0.85;
}

.auth-brand h1 {
    margin: 16px 0 12px;
    font-size: 38px;
    line-height: 1.1;
}

.auth-brand p {
    margin: 0;
    font-size: 16px;
    line-height: 1.7;
    opacity: 0.92;
}

.auth-card {
    background: var(--auth-surface);
    padding: 42px 36px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.register-card {
    justify-content: flex-start;
}

.auth-card h2 {
    margin: 0 0 18px;
    font-size: 28px;
}

.form-message {
    display: block;
    min-height: 18px;
    margin-bottom: 8px;
    font-size: 14px;
}

.form-message.error {
    color: var(--auth-danger);
}

.form-message.success {
    color: var(--auth-success);
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
}

.form-control {
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--auth-border);
    border-radius: 12px;
    background: var(--auth-surface-soft);
    color: var(--auth-text);
    padding: 11px 14px;
    font-size: 15px;
    outline: none;
}

.form-control:focus {
    border-color: var(--auth-primary);
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(60, 141, 188, 0.12);
}

textarea.form-control {
    resize: vertical;
    min-height: 94px;
}

.validator {
    display: block;
    margin-top: 6px;
    color: var(--auth-danger);
    font-size: 12px;
}

.form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 18px;
}

.checkbox-wrap {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--auth-text-soft);
}

.inline-link {
    color: var(--auth-primary);
    font-size: 14px;
    font-weight: 600;
}

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 18px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}

.btn-primary {
    width: 100%;
    border: 0;
    background: linear-gradient(135deg, var(--auth-primary-dark), var(--auth-primary));
    color: #ffffff;
}

.btn-secondary {
    border: 1px solid var(--auth-border);
    background: #ffffff;
    color: var(--auth-text);
}

.auth-footer-note {
    margin-top: 16px;
    font-size: 13px;
    color: var(--auth-text-soft);
}

.auth-footer-note code {
    padding: 3px 8px;
    border-radius: 8px;
    background: #edf4f9;
    color: #1f4e79;
    font-size: 12px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 16px;
}

.form-group-full {
    grid-column: 1 / -1;
}

.form-actions {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-top: 8px;
}

.form-actions .btn-primary {
    width: auto;
}

@media (max-width: 920px) {
    .auth-panel,
    .register-panel {
        grid-template-columns: 1fr;
    }

    .auth-brand,
    .auth-card {
        padding: 32px 24px;
    }
}

@media (max-width: 640px) {
    .auth-shell {
        padding: 16px;
    }

    .auth-panel {
        border-radius: 18px;
    }

    .auth-brand h1 {
        font-size: 30px;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .form-row,
    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .form-actions .btn-primary,
    .form-actions .btn-secondary {
        width: 100%;
    }
}