.mobile-auth-modal {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.6);
        align-items: center;
        justify-content: center;
        z-index: 9999;
        overflow-y: auto;
    }

    .mobile-auth-modal.show {
        display: flex;
    }

    .mobile-remember label {
        margin-bottom: 0 !important;
    }

    .mobile-auth-content {
        background: #fff;
        width: 90%;
        max-width: 420px;
        border-radius: 12px;
        position: relative;
        padding: 20px;
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    }

    .mobile-auth-close {
        position: absolute;
        top: 12px;
        right: 16px;
        font-size: 28px;
        cursor: pointer;
        color: #555;
    }

    /* ---------- Typography ---------- */
    .mobile-auth-title {
        font-size: 18px;
        font-weight: 600;
        margin: 8px 0 8px;
        color: #0F93FE;
    }

    .mobile-auth-subtitle {
        font-size: 14px;
        color: #002633;
        margin: 0 0 16px;
    }

    /* ---------- Form ---------- */
    .mobile-form-group {
        position: relative;
        margin-bottom: 12px;
    }

    .mobile-prefix {
        position: absolute;
        left: 12px;
        top: 50%;
        transform: translateY(-50%);
        font-weight: 600;
        font-size: 14px;
        color: #111;
    }

    .mobile-input {
        width: 100%;
        padding: 12px 12px 12px 44px;
        border: 1px solid #ddd;
        border-radius: 6px;
        font-size: 14px;
        height: 40px;
    }

    #mobileProfileForm .mobile-input {
        padding: 12px;
    }

    .mobile-name-row {
        display: flex;
        gap: 8px;
    }

    .mobile-name-row .mobile-input {
        flex: 1;
    }

    .mobile-remember {
        display: flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        margin-bottom: 16px;
    }

    .mobile-terms {
        font-size: 12px;
        color: #777;
        margin-top: 16px;
        text-align: center;
    }

    .mobile-terms a {
        color: #0F93FE;
        text-decoration: underline;
    }

    /* ---------- Buttons ---------- */
    .mobile-btn-primary {
        width: 100%;
        padding: 12px;
        background: #0F93FE;
        color: #fff;
        border: none;
        border-radius: 6px;
        font-size: 15px;
        font-weight: 600;
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 6px;
        cursor: pointer;
        height: 40px;
    }

    .mobile-arrow {
        font-weight: bold;
        font-size: 18px;
    }

    .mobile-btn-primary:disabled {
        background: #aaa;
        cursor: not-allowed;
    }

    /* ---------- Errors ---------- */
    .mobile-error {
        color: #e74c3c;
        font-size: 13px;
        margin-top: 4px;
        min-height: 18px;
    }

    /* ---------- OTP screen ---------- */
    .mobile-otp-header {
        display: flex;
        align-items: center;
        margin-bottom: 12px;
    }

    .mobile-back,
    .mobile-edit {
        background: none;
        border: none;
        font-size: 13px;
        font-weight: 600;
        cursor: pointer;
        color: #0F93FE;
    }

    .mobile-resend {
        font-size: 13px;
        color: #002633;
        margin: 12px 0;
        display: flex;
        align-items: center;
        gap: 4px;
    }

    .mobile-timer {
        color: #0F93FE;
        font-weight: 600;
    }

    .mobile-resend-link {
        background: none;
        border: none;
        color: #0F93FE;
        text-decoration: underline;
        cursor: pointer;
    }

    /* ---------- Loading spinner (optional) ---------- */
    .mobile-btn-primary .loading-spinner {
        width: 16px;
        height: 16px;
        border: 2px solid #fff;
        border-top-color: transparent;
        border-radius: 50%;
        animation: spin 0.8s linear infinite;
        margin-right: 8px;
    }

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