.mepco-bill-card {
    --brand: #0F766E;
    --brand-dark: #0b5b54;
    --focus: #60a5fa;
    --ink: #1f2937;
    --muted: #9ca3af;
    --border: #e5e7eb;
    --card-bg: #ffffff;
    --error-bg: #fef2f2;
    --error-border: #fecaca;
    --error-ink: #b91c1c;
    --success-bg: #f0fdf4;
    --success-border: #bbf7d0;
    --success-ink: #166534;
    --radius: 16px;
    box-sizing: border-box;
    width: 100%;
    max-width: 480px;
    margin: 16px auto;
    background: var(--card-bg);
    border: 1px solid #eceff3;
    border-radius: var(--radius);
    padding: 28px 24px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--ink);
}

.mepco-bill-card *,
.mepco-bill-card *::before,
.mepco-bill-card *::after {
    box-sizing: border-box;
}

.mepco-bill-card .visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.mepco-bill-card .saved-number {
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 10px 12px;
    margin-bottom: 16px;
    background: #f9fafb;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.875rem;
    cursor: pointer;
}

.mepco-bill-card .saved-number.is-visible {
    display: flex;
}

.mepco-bill-card .saved-number__remove {
    border: none;
    background: none;
    font-size: 1.1rem;
    line-height: 1;
    color: var(--muted);
    cursor: pointer;
    padding: 2px 6px;
}

.mepco-bill-card .saved-number__remove:hover {
    color: var(--error-ink);
}

.mepco-bill-card .bill-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mepco-bill-card .field input[type="text"] {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 0.95rem;
    color: var(--ink);
    background: #fff;
}

.mepco-bill-card .field input[type="text"]::placeholder {
    color: #b0b7c3;
}

.mepco-bill-card .field input[type="text"]:focus {
    outline: none;
    border-color: var(--focus);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.35);
}

.mepco-bill-card .divider {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    font-size: 0.9rem;
    margin: -4px 0;
}

.mepco-bill-card .checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: #6b7280;
    cursor: pointer;
    user-select: none;
}

.mepco-bill-card .checkbox input {
    width: 16px;
    height: 16px;
    accent-color: var(--brand);
}

.mepco-bill-card .btn {
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    padding: 14px 16px;
}

.mepco-bill-card .btn--primary {
    background: var(--brand);
    color: #fff;
    transition: background 0.15s ease;
    width: 100%;
}

.mepco-bill-card .btn--primary:hover,
.mepco-bill-card .btn--primary:focus {
    background: var(--brand-dark);
}

.mepco-bill-card .btn--link {
    background: none;
    color: #2563eb;
    padding: 4px 0;
    font-size: 0.85rem;
    text-decoration: underline;
}

.mepco-bill-card .alert {
    display: none;
    margin-top: 16px;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 0.875rem;
    line-height: 1.4;
}

.mepco-bill-card .alert.is-visible {
    display: block;
}

.mepco-bill-card .alert p {
    margin: 0 0 4px;
}

.mepco-bill-card .alert p:last-child {
    margin-bottom: 0;
}

.mepco-bill-card .alert--error {
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    color: var(--error-ink);
}

.mepco-bill-card .alert--success {
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success-ink);
}

.mepco-bill-card .alert--success .muted {
    color: var(--muted);
}

@media (max-width: 480px) {
    .mepco-bill-card {
        padding: 22px 16px;
        margin: 12px auto;
    }
}