body.page-auth-split {
    --auth-page-bg: linear-gradient(
        135deg,
        color-mix(in srgb, var(--bg-primary) 78%, var(--color-deep-navy) 22%) 0%,
        color-mix(in srgb, var(--color-deep-navy) 84%, var(--bg-secondary) 16%) 52%,
        color-mix(in srgb, var(--accent-info) 10%, var(--bg-primary) 90%) 100%
    );
    --auth-brand-bg: linear-gradient(
        160deg,
        color-mix(in srgb, var(--color-deep-navy) 92%, var(--bg-primary) 8%),
        color-mix(in srgb, var(--bg-primary) 94%, var(--accent-primary) 6%)
    );
    --auth-surface: color-mix(in srgb, var(--glass-bg) 88%, var(--bg-secondary) 12%);
    --auth-border: color-mix(in srgb, var(--glass-border) 88%, transparent);
    --auth-input-bg: color-mix(in srgb, var(--bg-secondary) 32%, transparent);
    --auth-input-focus: color-mix(in srgb, var(--accent-info) 12%, var(--bg-secondary));
    --auth-pill-bg: color-mix(in srgb, var(--accent-primary) 12%, transparent);
    --auth-pill-border: color-mix(in srgb, var(--accent-primary) 22%, transparent);
    --auth-info-bg: color-mix(in srgb, var(--accent-info) 10%, transparent);
    --auth-info-border: color-mix(in srgb, var(--accent-info) 28%, transparent);
    --auth-error-bg: color-mix(in srgb, var(--accent-danger) 12%, transparent);
    --auth-error-border: color-mix(in srgb, var(--accent-danger) 30%, transparent);
    --auth-success-bg: color-mix(in srgb, var(--accent-success) 12%, transparent);
    --auth-success-border: color-mix(in srgb, var(--accent-success) 30%, transparent);
    --auth-brand-shadow: drop-shadow(0 0 30px color-mix(in srgb, var(--accent-primary) 30%, transparent));
    --auth-button-shadow: 0 10px 30px color-mix(in srgb, var(--accent-primary) 26%, transparent);
    font-family: var(--font-body);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    background: var(--auth-page-bg);
    overflow-x: hidden;
}

body.page-auth-split::before {
    content: '';
    position: fixed;
    inset: 0;
    background:
        radial-gradient(2px 2px at 20% 30%, color-mix(in srgb, var(--accent-primary) 18%, transparent), transparent),
        radial-gradient(2px 2px at 60% 70%, color-mix(in srgb, var(--accent-info) 15%, transparent), transparent),
        radial-gradient(1px 1px at 80% 20%, color-mix(in srgb, var(--accent-primary) 12%, transparent), transparent),
        radial-gradient(1px 1px at 40% 80%, color-mix(in srgb, var(--accent-info) 10%, transparent), transparent);
    animation: auth-drift 20s linear infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes auth-drift {
    0% { transform: translateY(0); }
    100% { transform: translateY(-60px); }
}

.login-brand {
    width: 45%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 4rem 3rem;
    position: relative;
    z-index: 1;
    background: var(--auth-brand-bg);
    border-right: 1px solid var(--auth-border);
}

.login-brand,
.login-form-panel,
.login-card {
    box-sizing: border-box;
}

.brand-logo {
    width: 120px;
    height: auto;
    object-fit: contain;
    margin-bottom: 1.5rem;
    filter: var(--auth-brand-shadow);
    animation: auth-float 4s ease-in-out infinite;
}

@keyframes auth-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.brand-title {
    font-family: var(--font-secondary);
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-warning));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.75rem;
    letter-spacing: 2px;
}

.brand-tagline {
    font-size: 1.1rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 320px;
    line-height: 1.6;
    margin-bottom: 2.5rem;
}

.brand-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.brand-pill {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--auth-pill-bg);
    border: 1px solid var(--auth-pill-border);
    border-radius: 999px;
    padding: 0.5rem 1.1rem;
    font-size: 0.85rem;
    color: var(--accent-primary);
    font-weight: 500;
}

.brand-pill svg {
    width: 16px;
    height: 16px;
    fill: var(--accent-info);
    flex-shrink: 0;
}

.login-form-panel {
    width: 55%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    position: relative;
    z-index: 1;
}

.login-card {
    width: 100%;
    max-width: 440px;
    background: var(--auth-surface);
    border: 1px solid var(--auth-border);
    border-radius: 20px;
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    padding: 2.5rem 2.5rem 2rem;
    box-shadow: var(--shadow-xl);
}

.login-card h2,
.success-state h3,
.invalid-state h3 {
    font-family: var(--font-secondary);
    font-weight: 700;
}

.login-card h2 {
    font-size: 1.6rem;
    color: var(--accent-primary);
    margin-bottom: 0.35rem;
}

.login-card .subtitle,
.success-state p,
.invalid-state p,
.login-links,
.demo-creds {
    color: var(--text-secondary);
}

.login-card .subtitle,
.success-state p,
.invalid-state p {
    font-size: 0.92rem;
    margin-bottom: 1.8rem;
    line-height: 1.6;
}

.login-alert {
    padding: 0.85rem 1rem;
    border-radius: 10px;
    margin-bottom: 1.25rem;
    display: none;
    font-size: 0.9rem;
    font-weight: 500;
    align-items: center;
    gap: 0.6rem;
    animation: auth-shake-in 0.35s ease;
}

.login-alert.is-visible { display: flex; }

.login-alert.is-error {
    background: var(--auth-error-bg);
    border: 1px solid var(--auth-error-border);
    color: var(--accent-danger);
}

.login-alert.is-success {
    background: var(--auth-success-bg);
    border: 1px solid var(--auth-success-border);
    color: var(--accent-success);
}

@keyframes auth-shake-in {
    0% { transform: translateX(-6px); opacity: 0; }
    50% { transform: translateX(4px); }
    100% { transform: translateX(0); opacity: 1; }
}

.field { margin-bottom: 1.25rem; }

.field label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrap .icon-left {
    position: absolute;
    left: 14px;
    width: 18px;
    height: 18px;
    fill: var(--text-secondary);
    pointer-events: none;
    transition: fill var(--transition-base);
}

.input-wrap input {
    width: 100%;
    padding: 0.9rem 2.8rem;
    background: var(--auth-input-bg);
    border: 1px solid color-mix(in srgb, var(--accent-primary) 22%, transparent);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: var(--font-body);
    transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.input-wrap input:focus {
    outline: none;
    border-color: color-mix(in srgb, var(--accent-info) 50%, transparent);
    background: var(--auth-input-focus);
    box-shadow: 0 0 18px color-mix(in srgb, var(--accent-info) 16%, transparent);
}

.input-wrap input:focus ~ .icon-left { fill: var(--accent-info); }

.input-wrap input::placeholder,
.password-hint,
.login-divider,
.demo-creds,
.login-links,
.login-card .subtitle {
    color: var(--text-secondary);
}

.btn-eye {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
}

.btn-eye svg {
    width: 20px;
    height: 20px;
    fill: var(--text-secondary);
    transition: fill var(--transition-base);
}

.btn-eye:hover svg { fill: var(--accent-primary); }

.form-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.remember {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.88rem;
    color: var(--text-primary);
    cursor: pointer;
}

.remember input[type="checkbox"] {
    accent-color: var(--accent-primary);
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.forgot,
.login-links a {
    color: var(--accent-info);
    text-decoration: none;
    font-weight: 600;
    transition: color var(--transition-base);
}

.forgot-standalone {
    display: block;
    width: 100%;
    max-width: 100%;
    overflow-wrap: anywhere;
    text-align: right;
    margin: 0 0 1.5rem;
}

.forgot:hover,
.login-links a:hover { color: var(--accent-primary); }

.btn-signin,
.btn-submit {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-warning));
    border: none;
    border-radius: 12px;
    color: var(--bg-primary);
    font-family: var(--font-secondary);
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: transform 0.25s, box-shadow var(--transition-base);
}

.btn-submit { margin-top: 0.5rem; }

.btn-signin:hover,
.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--auth-button-shadow);
}

.btn-signin:active,
.btn-submit:active { transform: translateY(0); }

.btn-signin:disabled,
.btn-submit:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn-signin .spinner,
.btn-submit .spinner {
    width: 20px;
    height: 20px;
    border: 3px solid color-mix(in srgb, var(--bg-primary) 22%, transparent);
    border-top-color: var(--bg-primary);
    border-radius: 50%;
    animation: auth-spin 0.6s linear infinite;
    display: none;
}

.btn-signin .spinner.is-visible,
.btn-submit .spinner.is-visible { display: inline-block; }

@keyframes auth-spin {
    to { transform: rotate(360deg); }
}

.login-divider {
    display: flex;
    align-items: center;
    margin: 1.6rem 0;
    font-size: 0.85rem;
}

.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--accent-primary) 28%, transparent), transparent);
}

.login-divider span { padding: 0 0.9rem; }

.demo-box {
    background: var(--auth-info-bg);
    border: 1px dashed var(--auth-info-border);
    border-radius: 12px;
    padding: 1rem 1.2rem;
    margin-bottom: 1.5rem;
}

.demo-box-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-info);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.demo-box-title svg {
    width: 14px;
    height: 14px;
    fill: var(--accent-info);
}

.demo-creds {
    font-size: 0.82rem;
    line-height: 1.5;
    font-family: var(--font-body);
}

.demo-creds strong { color: var(--text-primary); font-weight: 600; }

.btn-autofill {
    margin-top: 0.65rem;
    padding: 0.45rem 1rem;
    background: color-mix(in srgb, var(--accent-info) 14%, transparent);
    border: 1px solid color-mix(in srgb, var(--accent-info) 30%, transparent);
    border-radius: 8px;
    color: var(--accent-info);
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition-base), transform var(--transition-fast);
}

.btn-autofill:hover {
    background: color-mix(in srgb, var(--accent-info) 22%, transparent);
    transform: translateY(-1px);
}

.login-links {
    text-align: center;
    font-size: 0.9rem;
}

.success-state,
.invalid-state {
    display: none;
    text-align: center;
}

.success-state.is-visible,
.invalid-state.is-visible { display: block; }

.auth-state-hidden { display: none !important; }

.success-state .check-icon,
.invalid-state .warn-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.25rem;
}

.success-state .check-icon,
.success-state h3 { color: var(--accent-success); fill: var(--accent-success); }

.invalid-state .warn-icon,
.invalid-state h3 { color: var(--accent-danger); fill: var(--accent-danger); }

.password-strength {
    height: 4px;
    border-radius: 2px;
    margin-top: 0.5rem;
    background: color-mix(in srgb, var(--bg-secondary) 45%, transparent);
    overflow: hidden;
}

.password-strength .bar,
.password-strength-bar {
    height: 100%;
    width: 0%;
    border-radius: 2px;
    transition: width var(--transition-base), background var(--transition-base);
}

.password-strength .bar.password-strength-weak,
.password-strength-weak { background: var(--accent-danger); }

.password-strength .bar.password-strength-medium,
.password-strength-medium { background: var(--accent-warning); }

.password-strength .bar.password-strength-strong,
.password-strength-strong { background: var(--accent-success); }

.password-hint.is-weak { color: var(--accent-danger); }
.password-hint.is-medium { color: var(--accent-warning); }
.password-hint.is-strong { color: var(--accent-success); }

[data-theme="light"] body.page-auth-split {
    --auth-page-bg: linear-gradient(
        135deg,
        color-mix(in srgb, var(--bg-primary) 88%, var(--bg-secondary) 12%) 0%,
        color-mix(in srgb, var(--bg-secondary) 80%, var(--accent-primary) 20%) 52%,
        color-mix(in srgb, var(--accent-info) 10%, var(--bg-secondary) 90%) 100%
    );
    --auth-brand-bg: linear-gradient(
        160deg,
        color-mix(in srgb, var(--bg-secondary) 92%, var(--accent-primary) 8%),
        color-mix(in srgb, var(--bg-primary) 86%, var(--accent-info) 14%)
    );
    --auth-surface: color-mix(in srgb, var(--bg-card) 92%, transparent);
    --auth-input-bg: color-mix(in srgb, var(--bg-input) 92%, transparent);
    --auth-input-focus: color-mix(in srgb, var(--accent-info) 10%, var(--bg-card));
    --auth-brand-shadow: drop-shadow(0 0 24px color-mix(in srgb, var(--accent-primary) 18%, transparent));
}

@media (max-width: 900px) {
    body.page-auth-split { flex-direction: column; }

    .login-brand {
        width: 100%;
        padding: 2.5rem 2rem 2rem;
        border-right: none;
        border-bottom: 1px solid var(--auth-border);
    }

    .brand-title { font-size: 2.2rem; }
    .brand-tagline { font-size: 0.95rem; margin-bottom: 1.5rem; }

    .login-form-panel {
        width: 100%;
        padding: 2rem 1.5rem;
    }

    .form-meta {
        flex-wrap: wrap;
        justify-content: flex-start;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .remember {
        flex: 1 1 auto;
        min-width: 0;
    }

    .forgot {
        display: block;
        width: 100%;
        text-align: left;
    }

    .forgot-standalone {
        margin-top: 0;
        text-align: left;
        font-size: 0.94rem;
    }

    .login-divider span {
        text-align: center;
    }

    .login-links {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.35rem;
        line-height: 1.5;
    }
}

@media (max-width: 520px) {
    .login-card { padding: 2rem 1.5rem 1.5rem; }
    .brand-pills { gap: 0.5rem; }
    .brand-pill { font-size: 0.78rem; padding: 0.4rem 0.85rem; }
}

@media (max-width: 640px) {
    .login-brand {
        padding: 2rem 1.25rem 1.5rem;
    }

    .brand-logo {
        width: 96px;
    }

    .brand-title {
        font-size: 1.9rem;
    }

    .brand-tagline {
        max-width: 20ch;
        margin-left: auto;
        margin-right: auto;
        overflow-wrap: anywhere;
    }

    .brand-pills {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .brand-pill {
        width: 100%;
        justify-content: center;
    }

    .login-form-panel {
        padding: 1.5rem 1rem;
    }

    .login-card {
        padding: 1.75rem 1.1rem 1.35rem;
    }
}