:root {
    --auth-bg: #0f172a;
    --auth-card-bg: #1e293b;
    --auth-input-bg: #334155;
}

body {
    background: var(--auth-bg);
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: #f8fafc;
}

.auth-card {
    width: 100%;
    max-width: 600px;
    background: var(--auth-card-bg);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 2.5rem 2.25rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.auth-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-bottom: 2rem;
}

.auth-brand .brand-icon {
    width: 44px;
    height: 44px;
    background: var(--brand, #c8000a);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(200, 0, 10, 0.3);
}

.auth-brand .brand-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.5px;
}

.auth-brand .brand-name em {
    font-style: italic;
    font-family: serif;
    font-weight: 400;
    color: var(--brand, #c8000a);
    margin: 0 1px;
}

.auth-title {
    color: #fff;
    font-weight: 700;
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.auth-subtitle {
    color: #94a3b8;
    font-size: 0.875rem;
    font-weight: 450;
}

.form-label {
    color: #cbd5e1;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-control {
    background: var(--auth-input-bg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    border-radius: 10px;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    transition: all 0.2s;
}

.form-control:focus {
    background: var(--auth-input-bg);
    border-color: var(--brand, #c8000a);
    box-shadow: 0 0 0 4px rgba(200, 0, 10, 0.15);
    color: #fff;
}

.form-control::placeholder {
    color: #64748b;
}

.btn-auth {
    width: 100%;
    padding: 0.875rem;
    font-size: 0.9375rem;
    margin-top: 1.25rem;
    background: var(--brand, #c8000a) !important;
    border: none !important;
    color: #fff !important;
    font-weight: 700;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(200, 0, 10, 0.25) !important;
    transition: all 0.2s !important;
}

.btn-auth:hover {
    background: var(--brand-hover, #a80008) !important;
    transform: translateY(-1px);
    box-shadow: 0 6px 15px rgba(200, 0, 10, 0.35) !important;
}

.btn-auth:active {
    transform: translateY(0);
}

.invalid-feedback {
    font-size: 0.8125rem;
    color: #f87171;
    margin-top: 0.375rem;
    font-weight: 500;
}

.alert {
    border-radius: 10px;
    padding: 1rem;
    font-weight: 500;
}